From c89c54a361460528daa89c2b7394fa7daea1db1b Mon Sep 17 00:00:00 2001
From: Francesco Novy <francesco.novy@sentry.io>
Date: Wed, 28 Jun 2023 15:33:38 +0200
Subject: [PATCH] build: Update typescript from 3.8.3 to 4.9.5 (#8255)

This updates the TS version we use from 3.8.3 to 4.9.5. This allows us
to use newer TS features, as well as as improves compatibility with
newer @types/xxx packages that use newer features, which leads to issues
when transitive dependencies are used etc.

We use [downlevel-dts](https://www.npmjs.com/package/downlevel-dts) to
generate a 3.8 compatible types output _in addition_, so this should be
fully backwards compatible. TS provides a built-in way to tell it to use
a certain types output for a certain version, so this should work with
no breaking change.

The main changes necessary here are small tweaks to types which are
required in 4.9.x.
---
 .github/workflows/build.yml                   | 19 +++++-
 nx.json                                       |  4 +-
 package.json                                  |  5 +-
 packages/angular-ivy/package.json             |  3 +-
 packages/angular/package.json                 |  4 +-
 packages/angular/src/errorhandler.ts          |  6 +-
 packages/angular/test/errorhandler.test.ts    |  2 +-
 .../browser-integration-tests/package.json    |  1 -
 packages/browser/package.json                 |  9 ++-
 packages/browser/src/eventbuilder.ts          |  3 +-
 .../browser/src/integrations/breadcrumbs.ts   |  2 +-
 .../test/unit/integrations/helpers.test.ts    |  2 +-
 .../test/unit/transports/offline.test.ts      |  2 +-
 packages/core/package.json                    |  9 ++-
 packages/core/src/transports/offline.ts       |  4 +-
 packages/core/test/lib/hint.test.ts           |  1 +
 .../core/test/lib/transports/offline.test.ts  |  2 +-
 packages/e2e-tests/package.json               |  1 -
 .../create-next-app/package.json              |  2 +-
 .../create-react-app/package.json             |  2 +-
 .../create-react-app/test-recipe.json         |  7 ++
 .../nextjs-app-dir/package.json               |  2 +-
 .../package.json                              |  2 +-
 .../standard-frontend-react/package.json      |  2 +-
 .../standard-frontend-react/test-recipe.json  |  7 ++
 .../test-applications/sveltekit/package.json  |  2 +-
 packages/ember/package.json                   |  1 -
 packages/gatsby/package.json                  |  7 +-
 packages/hub/package.json                     |  9 ++-
 packages/integration-shims/package.json       |  7 +-
 packages/integrations/package.json            |  9 ++-
 .../integrations/test/captureconsole.test.ts  |  2 +-
 packages/nextjs/package.json                  |  9 ++-
 .../wrapApiHandlerWithSentryVercelCrons.ts    |  4 +-
 packages/nextjs/src/config/webpack.ts         |  3 +-
 packages/nextjs/test/integration/package.json |  2 +-
 packages/nextjs/test/serverSdk.test.ts        |  1 +
 .../node-integration-tests/utils/run-tests.ts |  2 +-
 packages/node/package.json                    |  9 ++-
 packages/node/test/index.test.ts              |  2 +-
 packages/node/test/utils.test.ts              |  2 +-
 packages/opentelemetry-node/package.json      |  7 +-
 packages/overhead-metrics/package.json        |  2 +-
 packages/react/package.json                   |  9 ++-
 packages/react/test/reactrouterv6.4.test.tsx  |  6 ++
 packages/remix/package.json                   |  9 ++-
 packages/remix/src/utils/instrumentServer.ts  |  5 +-
 .../remix/src/utils/serverAdapters/express.ts |  2 +-
 packages/remix/test/integration/package.json  |  2 +-
 packages/replay-worker/package.json           |  9 ++-
 packages/replay-worker/src/handleMessage.ts   |  2 +-
 packages/replay/.eslintignore                 |  2 +
 packages/replay/package.json                  |  9 ++-
 .../replay/src/coreHandlers/handleFetch.ts    |  2 +-
 .../src/util/createPerformanceEntries.ts      |  2 -
 .../src/util/dedupePerformanceEntries.ts      |  2 -
 .../test/fixtures/performanceEntry/lcp.ts     |  2 -
 .../fixtures/performanceEntry/navigation.ts   |  6 +-
 packages/serverless/package.json              |  9 ++-
 packages/svelte/package.json                  |  9 ++-
 packages/sveltekit/package.json               |  1 -
 packages/tracing-internal/package.json        |  9 ++-
 .../src/browser/metrics/index.ts              |  2 +
 .../web-vitals/lib/getNavigationEntry.ts      |  1 +
 .../src/node/integrations/prisma.ts           |  2 +-
 packages/tracing/package.json                 |  7 +-
 packages/types/package.json                   |  7 +-
 packages/typescript/package.json              |  2 +-
 packages/utils/package.json                   |  9 ++-
 packages/utils/src/envelope.ts                |  2 +-
 packages/utils/test/envelope.test.ts          |  6 +-
 packages/utils/test/worldwide.test.ts         |  1 +
 packages/vue/package.json                     |  9 ++-
 packages/wasm/package.json                    |  9 ++-
 scripts/ensure-bundle-deps.ts                 |  2 +-
 scripts/verify-packages-versions.js           |  2 +-
 yarn.lock                                     | 68 +++++++++----------
 77 files changed, 271 insertions(+), 138 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e2ec7fdcf411..0b254d24022b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -655,7 +655,9 @@ jobs:
           yarn test:package
 
   job_node_integration_tests:
-    name: Node (${{ matrix.node }}) Integration Tests
+    name:
+      Node (${{ matrix.node }})${{ (matrix.typescript && format(' (TS {0})', matrix.typescript)) || '' }} Integration
+      Tests
     needs: [job_get_metadata, job_build]
     if: needs.job_get_metadata.outputs.changed_node == 'true' || github.event_name != 'pull_request'
     runs-on: ubuntu-20.04
@@ -664,6 +666,12 @@ jobs:
       fail-fast: false
       matrix:
         node: [10, 12, 14, 16, 18, 20]
+        typescript:
+          - false
+        include:
+          # Only check typescript for latest version (to streamline CI)
+          - node: 20
+            typescript: '3.8'
     steps:
       - name: Check out current commit (${{ needs.job_get_metadata.outputs.commit_label }})
         uses: actions/checkout@v3
@@ -677,6 +685,11 @@ jobs:
         uses: ./.github/actions/restore-cache
         env:
           DEPENDENCY_CACHE_KEY: ${{ needs.job_build.outputs.dependency_cache_key }}
+
+      - name: Overwrite typescript version
+        if: matrix.typescript
+        run: yarn add --dev --ignore-workspace-root-check typescript@${{ matrix.typescript }}
+
       - name: Run integration tests
         env:
           NODE_VERSION: ${{ matrix.node }}
@@ -717,7 +730,7 @@ jobs:
           yarn test:integration:ci
 
   job_e2e_tests:
-    name: E2E Tests (Shard ${{ matrix.shard }})
+    name: E2E (Shard ${{ matrix.shard }}) Tests
     # We only run E2E tests for non-fork PRs because the E2E tests require secrets to work and they can't be accessed from forks
     # Dependabot PRs sadly also don't have access to secrets, so we skip them as well
     if:
@@ -730,6 +743,7 @@ jobs:
       fail-fast: false
       matrix:
         shard: [1, 2, 3]
+
     steps:
       - name: Check out current commit (${{ needs.job_get_metadata.outputs.commit_label }})
         uses: actions/checkout@v3
@@ -746,6 +760,7 @@ jobs:
         uses: ./.github/actions/restore-cache
         env:
           DEPENDENCY_CACHE_KEY: ${{ needs.job_build.outputs.dependency_cache_key }}
+
       - name: Get node version
         id: versions
         run: |
diff --git a/nx.json b/nx.json
index 096a0b0c9620..2341174dd956 100644
--- a/nx.json
+++ b/nx.json
@@ -64,7 +64,9 @@
       ],
       "outputs": [
         "{projectRoot}/build/types",
-        "{projectRoot}/build/npm/types"
+        "{projectRoot}/build/types-ts3.8",
+        "{projectRoot}/build/npm/types",
+        "{projectRoot}/build/npm/types-ts3.8"
       ]
     },
     "lint:eslint": {
diff --git a/package.json b/package.json
index 8ebd0541f657..feb5be7839d0 100644
--- a/package.json
+++ b/package.json
@@ -90,6 +90,7 @@
     "chai": "^4.1.2",
     "codecov": "^3.6.5",
     "deepmerge": "^4.2.2",
+    "downlevel-dts": "~0.11.0",
     "es-check": "7.1.0",
     "eslint": "7.32.0",
     "jest": "^27.5.1",
@@ -114,9 +115,9 @@
     "size-limit": "^4.5.5",
     "ts-jest": "^27.1.4",
     "ts-node": "10.9.1",
-    "tslib": "^2.3.1",
+    "tslib": "2.4.1",
     "typedoc": "^0.18.0",
-    "typescript": "3.8.3",
+    "typescript": "4.9.5",
     "vitest": "^0.29.2",
     "yalc": "^1.0.0-pre.53"
   },
diff --git a/packages/angular-ivy/package.json b/packages/angular-ivy/package.json
index b18a7e014fe3..f05c8de96ebf 100644
--- a/packages/angular-ivy/package.json
+++ b/packages/angular-ivy/package.json
@@ -24,7 +24,7 @@
     "@sentry/browser": "7.56.0",
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
-    "tslib": "^2.3.0"
+    "tslib": "^2.4.1"
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "~12.2.18",
@@ -37,7 +37,6 @@
     "@angular/platform-browser-dynamic": "~12.2.0",
     "@angular/router": "~12.2.0",
     "ng-packagr": "^12.1.1",
-    "typescript": "~4.3.5",
     "zone.js": "~0.11.4"
   },
   "scripts": {
diff --git a/packages/angular/package.json b/packages/angular/package.json
index 39a12c3303a7..ad1c7d7aa272 100644
--- a/packages/angular/package.json
+++ b/packages/angular/package.json
@@ -24,7 +24,7 @@
     "@sentry/browser": "7.56.0",
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
-    "tslib": "^2.0.0"
+    "tslib": "^2.4.1"
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "~0.1002.4",
@@ -38,7 +38,7 @@
     "@angular/router": "~10.2.5",
     "ng-packagr": "^10.1.0",
     "rxjs": "6.5.5",
-    "typescript": "~4.0.2",
+    "typescript": "4.0.2",
     "zone.js": "^0.11.8"
   },
   "scripts": {
diff --git a/packages/angular/src/errorhandler.ts b/packages/angular/src/errorhandler.ts
index 89f3b8b556ac..6940e0cc8cc1 100644
--- a/packages/angular/src/errorhandler.ts
+++ b/packages/angular/src/errorhandler.ts
@@ -2,7 +2,7 @@ import { HttpErrorResponse } from '@angular/common/http';
 import type { ErrorHandler as AngularErrorHandler } from '@angular/core';
 import { Inject, Injectable } from '@angular/core';
 import * as Sentry from '@sentry/browser';
-import { captureException } from '@sentry/browser';
+import type { Event, Scope } from '@sentry/types';
 import { addExceptionMechanism, isString } from '@sentry/utils';
 
 import { runOutsideAngular } from './zone';
@@ -101,7 +101,7 @@ class SentryErrorHandler implements AngularErrorHandler {
 
     // Capture handled exception and send it to Sentry.
     const eventId = runOutsideAngular(() =>
-      captureException(extractedError, scope => {
+      Sentry.captureException(extractedError, (scope: Scope) => {
         scope.addEventProcessor(event => {
           addExceptionMechanism(event, {
             type: 'angular',
@@ -126,7 +126,7 @@ class SentryErrorHandler implements AngularErrorHandler {
       const client = Sentry.getCurrentHub().getClient();
 
       if (client && client.on && !this._registeredAfterSendEventHandler) {
-        client.on('afterSendEvent', event => {
+        client.on('afterSendEvent', (event: Event) => {
           if (!event.type) {
             Sentry.showReportDialog({ ...this._options.dialogOptions, eventId: event.event_id });
           }
diff --git a/packages/angular/test/errorhandler.test.ts b/packages/angular/test/errorhandler.test.ts
index c43ad41629c1..633d4d81f7e9 100644
--- a/packages/angular/test/errorhandler.test.ts
+++ b/packages/angular/test/errorhandler.test.ts
@@ -57,7 +57,7 @@ describe('SentryErrorHandler', () => {
   describe('handleError method', () => {
     it('handleError method assigns the correct mechanism', () => {
       const addEventProcessorSpy = jest.spyOn(FakeScope, 'addEventProcessor').mockImplementationOnce(callback => {
-        void callback({}, { event_id: 'fake-event-id' });
+        void (callback as (event: any, hint: any) => void)({}, { event_id: 'fake-event-id' });
         return FakeScope;
       });
 
diff --git a/packages/browser-integration-tests/package.json b/packages/browser-integration-tests/package.json
index 63e61ebf57b7..9d95ca877c9c 100644
--- a/packages/browser-integration-tests/package.json
+++ b/packages/browser-integration-tests/package.json
@@ -53,7 +53,6 @@
     "html-webpack-plugin": "^5.5.0",
     "pako": "^2.1.0",
     "playwright": "^1.31.1",
-    "typescript": "^4.5.2",
     "webpack": "^5.52.0"
   },
   "devDependencies": {
diff --git a/packages/browser/package.json b/packages/browser/package.json
index d59b14ce1b48..6ec505295c27 100644
--- a/packages/browser/package.json
+++ b/packages/browser/package.json
@@ -12,6 +12,9 @@
   "main": "build/npm/cjs/index.js",
   "module": "build/npm/esm/index.js",
   "types": "build/npm/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/npm/types/index.d.ts": ["build/npm/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -21,7 +24,7 @@
     "@sentry/replay": "7.56.0",
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "devDependencies": {
     "@sentry-internal/integration-shims": "7.56.0",
@@ -53,7 +56,9 @@
     "build:bundle:es5": "JS_VERSION=es5 rollup -c rollup.bundle.config.js",
     "build:bundle:es6": "JS_VERSION=es6 rollup -c rollup.bundle.config.js",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/npm/types build/npm/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:bundle:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:bundle:watch": "rollup -c rollup.bundle.config.js --watch",
diff --git a/packages/browser/src/eventbuilder.ts b/packages/browser/src/eventbuilder.ts
index 6acc1080c56f..e361f1366cf3 100644
--- a/packages/browser/src/eventbuilder.ts
+++ b/packages/browser/src/eventbuilder.ts
@@ -208,7 +208,7 @@ export function eventFromUnknownInput(
   // https://developer.mozilla.org/en-US/docs/Web/API/DOMError
   // https://developer.mozilla.org/en-US/docs/Web/API/DOMException
   // https://webidl.spec.whatwg.org/#es-DOMException-specialness
-  if (isDOMError(exception as DOMError) || isDOMException(exception as DOMException)) {
+  if (isDOMError(exception) || isDOMException(exception as DOMException)) {
     const domException = exception as DOMException;
 
     if ('stack' in (exception as Error)) {
@@ -220,6 +220,7 @@ export function eventFromUnknownInput(
       addExceptionTypeValue(event, message);
     }
     if ('code' in domException) {
+      // eslint-disable-next-line deprecation/deprecation
       event.tags = { ...event.tags, 'DOMException.code': `${domException.code}` };
     }
 
diff --git a/packages/browser/src/integrations/breadcrumbs.ts b/packages/browser/src/integrations/breadcrumbs.ts
index 3d019945b53b..b5f734ce939c 100644
--- a/packages/browser/src/integrations/breadcrumbs.ts
+++ b/packages/browser/src/integrations/breadcrumbs.ts
@@ -348,5 +348,5 @@ function _historyBreadcrumb(handlerData: HandlerData & { from: string; to: strin
 }
 
 function _isEvent(event: unknown): event is Event {
-  return event && !!(event as Record<string, unknown>).target;
+  return !!event && !!(event as Record<string, unknown>).target;
 }
diff --git a/packages/browser/test/unit/integrations/helpers.test.ts b/packages/browser/test/unit/integrations/helpers.test.ts
index a3fe734d79d4..5b06835f834d 100644
--- a/packages/browser/test/unit/integrations/helpers.test.ts
+++ b/packages/browser/test/unit/integrations/helpers.test.ts
@@ -157,7 +157,7 @@ describe('internal wrap()', () => {
     try {
       wrapped();
     } catch (error) {
-      expect(error.message).toBe('boom');
+      expect((error as Error).message).toBe('boom');
     }
   });
 
diff --git a/packages/browser/test/unit/transports/offline.test.ts b/packages/browser/test/unit/transports/offline.test.ts
index b224df725bc6..aa5819fe155a 100644
--- a/packages/browser/test/unit/transports/offline.test.ts
+++ b/packages/browser/test/unit/transports/offline.test.ts
@@ -47,7 +47,7 @@ export const createTestTransport = (...sendResults: MockResult<TransportMakeRequ
             reject(next);
           } else {
             sendCount += 1;
-            resolve(next as TransportMakeRequestResponse | undefined);
+            resolve(next as TransportMakeRequestResponse);
           }
         });
       }),
diff --git a/packages/core/package.json b/packages/core/package.json
index 2464552af0f8..43202cc2f19e 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -12,19 +12,24 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
   "dependencies": {
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "scripts": {
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/core/src/transports/offline.ts b/packages/core/src/transports/offline.ts
index e318793624ce..c3864ead7ec5 100644
--- a/packages/core/src/transports/offline.ts
+++ b/packages/core/src/transports/offline.ts
@@ -131,10 +131,10 @@ export function makeOfflineTransport<TO>(
         retryDelay = START_DELAY;
         return result;
       } catch (e) {
-        if (store && (await shouldQueue(envelope, e, retryDelay))) {
+        if (store && (await shouldQueue(envelope, e as Error, retryDelay))) {
           await store.insert(envelope);
           flushWithBackOff();
-          log('Error sending. Event queued', e);
+          log('Error sending. Event queued', e as Error);
           return {};
         } else {
           throw e;
diff --git a/packages/core/test/lib/hint.test.ts b/packages/core/test/lib/hint.test.ts
index a975174dcd78..bd795ed79c8e 100644
--- a/packages/core/test/lib/hint.test.ts
+++ b/packages/core/test/lib/hint.test.ts
@@ -16,6 +16,7 @@ describe('Hint', () => {
 
   afterEach(() => {
     jest.clearAllMocks();
+    // @ts-ignore for testing
     delete GLOBAL_OBJ.__SENTRY__;
   });
 
diff --git a/packages/core/test/lib/transports/offline.test.ts b/packages/core/test/lib/transports/offline.test.ts
index 056d11aac90a..6a6474d51ef9 100644
--- a/packages/core/test/lib/transports/offline.test.ts
+++ b/packages/core/test/lib/transports/offline.test.ts
@@ -98,7 +98,7 @@ const createTestTransport = (
             reject(next);
           } else {
             sendCount += 1;
-            resolve(next as TransportMakeRequestResponse | undefined);
+            resolve(next as TransportMakeRequestResponse);
           }
         });
       }),
diff --git a/packages/e2e-tests/package.json b/packages/e2e-tests/package.json
index 13560617e1b2..6bacdf4d2159 100644
--- a/packages/e2e-tests/package.json
+++ b/packages/e2e-tests/package.json
@@ -26,7 +26,6 @@
     "fs-extra": "11.1.0",
     "glob": "8.0.3",
     "ts-node": "10.9.1",
-    "typescript": "3.8.3",
     "yaml": "2.2.2"
   },
   "volta": {
diff --git a/packages/e2e-tests/test-applications/create-next-app/package.json b/packages/e2e-tests/test-applications/create-next-app/package.json
index af2a7830f3d8..3232c1eca7fe 100644
--- a/packages/e2e-tests/test-applications/create-next-app/package.json
+++ b/packages/e2e-tests/test-applications/create-next-app/package.json
@@ -16,7 +16,7 @@
     "next": "13.0.7",
     "react": "18.2.0",
     "react-dom": "18.2.0",
-    "typescript": "4.9.4"
+    "typescript": "4.9.5"
   },
   "devDependencies": {
     "@playwright/test": "^1.27.1"
diff --git a/packages/e2e-tests/test-applications/create-react-app/package.json b/packages/e2e-tests/test-applications/create-react-app/package.json
index e0fc502238d0..062eef12aa45 100644
--- a/packages/e2e-tests/test-applications/create-react-app/package.json
+++ b/packages/e2e-tests/test-applications/create-react-app/package.json
@@ -15,7 +15,7 @@
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "react-scripts": "5.0.1",
-    "typescript": "4.4.2",
+    "typescript": "4.9.5",
     "web-vitals": "2.1.0"
   },
   "scripts": {
diff --git a/packages/e2e-tests/test-applications/create-react-app/test-recipe.json b/packages/e2e-tests/test-applications/create-react-app/test-recipe.json
index a45dde0d9c07..f0f5e19553cc 100644
--- a/packages/e2e-tests/test-applications/create-react-app/test-recipe.json
+++ b/packages/e2e-tests/test-applications/create-react-app/test-recipe.json
@@ -3,6 +3,13 @@
   "testApplicationName": "create-react-app",
   "buildCommand": "pnpm install && pnpm build",
   "tests": [],
+  "versions": [
+    {
+      "dependencyOverrides": {
+        "typescript": "3.8.3"
+      }
+    }
+  ],
   "canaryVersions": [
     {
       "dependencyOverrides": {
diff --git a/packages/e2e-tests/test-applications/nextjs-app-dir/package.json b/packages/e2e-tests/test-applications/nextjs-app-dir/package.json
index b4e58ced63a2..45f79250d05f 100644
--- a/packages/e2e-tests/test-applications/nextjs-app-dir/package.json
+++ b/packages/e2e-tests/test-applications/nextjs-app-dir/package.json
@@ -16,7 +16,7 @@
     "next": "13.2.4",
     "react": "18.2.0",
     "react-dom": "18.2.0",
-    "typescript": "4.9.4",
+    "typescript": "4.9.5",
     "wait-port": "1.0.4",
     "ts-node": "10.9.1",
     "@playwright/test": "^1.27.1"
diff --git a/packages/e2e-tests/test-applications/standard-frontend-react-tracing-import/package.json b/packages/e2e-tests/test-applications/standard-frontend-react-tracing-import/package.json
index f1e97a01925a..abfb3bfea914 100644
--- a/packages/e2e-tests/test-applications/standard-frontend-react-tracing-import/package.json
+++ b/packages/e2e-tests/test-applications/standard-frontend-react-tracing-import/package.json
@@ -16,7 +16,7 @@
     "react-dom": "18.2.0",
     "react-router-dom": "^6.4.1",
     "react-scripts": "5.0.1",
-    "typescript": "4.4.2",
+    "typescript": "4.9.5",
     "web-vitals": "2.1.0"
   },
   "scripts": {
diff --git a/packages/e2e-tests/test-applications/standard-frontend-react/package.json b/packages/e2e-tests/test-applications/standard-frontend-react/package.json
index d8f6db397dcd..8ea59b80e55a 100644
--- a/packages/e2e-tests/test-applications/standard-frontend-react/package.json
+++ b/packages/e2e-tests/test-applications/standard-frontend-react/package.json
@@ -15,7 +15,7 @@
     "react-dom": "18.2.0",
     "react-router-dom": "^6.4.1",
     "react-scripts": "5.0.1",
-    "typescript": "4.4.2",
+    "typescript": "4.9.5",
     "web-vitals": "2.1.0"
   },
   "scripts": {
diff --git a/packages/e2e-tests/test-applications/standard-frontend-react/test-recipe.json b/packages/e2e-tests/test-applications/standard-frontend-react/test-recipe.json
index c3f5f2b89166..2f2e72c8f501 100644
--- a/packages/e2e-tests/test-applications/standard-frontend-react/test-recipe.json
+++ b/packages/e2e-tests/test-applications/standard-frontend-react/test-recipe.json
@@ -8,6 +8,13 @@
       "testCommand": "pnpm test"
     }
   ],
+  "versions": [
+    {
+      "dependencyOverrides": {
+        "typescript": "3.8.3"
+      }
+    }
+  ],
   "canaryVersions": [
     {
       "dependencyOverrides": {
diff --git a/packages/e2e-tests/test-applications/sveltekit/package.json b/packages/e2e-tests/test-applications/sveltekit/package.json
index 003868af5ab8..5c4139365599 100644
--- a/packages/e2e-tests/test-applications/sveltekit/package.json
+++ b/packages/e2e-tests/test-applications/sveltekit/package.json
@@ -22,7 +22,7 @@
     "svelte": "^3.54.0",
     "svelte-check": "^3.0.1",
     "ts-node": "10.9.1",
-    "tslib": "^2.4.1",
+    "tslib": "2.4.1",
     "typescript": "^5.0.0",
     "vite": "^4.2.0",
     "wait-port": "1.0.4"
diff --git a/packages/ember/package.json b/packages/ember/package.json
index 2e184fc17a7e..d4e13264be24 100644
--- a/packages/ember/package.json
+++ b/packages/ember/package.json
@@ -75,7 +75,6 @@
     "loader.js": "~4.7.0",
     "qunit": "~2.19.2",
     "qunit-dom": "~2.0.0",
-    "typescript": "~4.5.2",
     "webpack": "~5.74.0"
   },
   "engines": {
diff --git a/packages/gatsby/package.json b/packages/gatsby/package.json
index 337af4a11f32..4bc327bd98f9 100644
--- a/packages/gatsby/package.json
+++ b/packages/gatsby/package.json
@@ -16,6 +16,9 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -40,7 +43,9 @@
     "build:plugin": "tsc -p tsconfig.plugin.json",
     "build:transpile": "run-p build:rollup build:plugin",
     "build:rollup": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/hub/package.json b/packages/hub/package.json
index bc795aa6bee5..947b4aad6da1 100644
--- a/packages/hub/package.json
+++ b/packages/hub/package.json
@@ -12,6 +12,9 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -19,13 +22,15 @@
     "@sentry/core": "7.56.0",
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "scripts": {
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/integration-shims/package.json b/packages/integration-shims/package.json
index 472198466754..eb7e242de4da 100644
--- a/packages/integration-shims/package.json
+++ b/packages/integration-shims/package.json
@@ -5,12 +5,17 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "sideEffects": false,
   "private": true,
   "scripts": {
     "build": "run-p build:transpile build:types",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:dev": "yarn build",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "run-p build:watch",
diff --git a/packages/integrations/package.json b/packages/integrations/package.json
index 13e1f5a04343..4025485a3e68 100644
--- a/packages/integrations/package.json
+++ b/packages/integrations/package.json
@@ -15,11 +15,14 @@
   "main": "build/npm/cjs/index.js",
   "module": "build/npm/esm/index.js",
   "types": "build/npm/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/npm/types/index.d.ts": ["build/npm/types-ts3.8/index.d.ts"] }
+  },
   "dependencies": {
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
     "localforage": "^1.8.1",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "devDependencies": {
     "@sentry/browser": "7.56.0",
@@ -30,7 +33,9 @@
     "build:bundle": "ts-node scripts/buildBundles.ts --parallel",
     "build:dev": "run-p build:transpile build:types",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/npm/types build/npm/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/integrations/test/captureconsole.test.ts b/packages/integrations/test/captureconsole.test.ts
index 6ff08df2e46f..be766d5f6c8d 100644
--- a/packages/integrations/test/captureconsole.test.ts
+++ b/packages/integrations/test/captureconsole.test.ts
@@ -113,7 +113,7 @@ describe('CaptureConsole setup', () => {
 
   it('setup should fail gracefully when console is not available', () => {
     const consoleRef = global.console;
-    // remove console
+    // @ts-ignore remove console
     delete global.console;
 
     expect(() => {
diff --git a/packages/nextjs/package.json b/packages/nextjs/package.json
index 69b24dcfbb44..09588b12491d 100644
--- a/packages/nextjs/package.json
+++ b/packages/nextjs/package.json
@@ -13,6 +13,9 @@
   "module": "build/esm/index.server.js",
   "browser": "build/esm/index.client.js",
   "types": "build/types/index.types.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/npm/types/index.d.ts": ["build/npm/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -28,7 +31,7 @@
     "chalk": "3.0.0",
     "rollup": "2.78.0",
     "stacktrace-parser": "^0.1.10",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "devDependencies": {
     "@types/webpack": "^4.41.31",
@@ -49,7 +52,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "ts-node scripts/buildRollup.ts",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "nodemon --ext ts --watch src scripts/buildRollup.ts",
diff --git a/packages/nextjs/src/common/wrapApiHandlerWithSentryVercelCrons.ts b/packages/nextjs/src/common/wrapApiHandlerWithSentryVercelCrons.ts
index 3b9bc8ca7045..d324cc2de7c3 100644
--- a/packages/nextjs/src/common/wrapApiHandlerWithSentryVercelCrons.ts
+++ b/packages/nextjs/src/common/wrapApiHandlerWithSentryVercelCrons.ts
@@ -16,13 +16,13 @@ export function wrapApiHandlerWithSentryVercelCrons<F extends (...args: any[]) =
   vercelCronsConfig: VercelCronsConfig,
 ): F {
   return new Proxy(handler, {
-    apply: (originalFunction, thisArg, args: [NextApiRequest | EdgeRequest | undefined] | undefined) => {
+    apply: (originalFunction, thisArg, args: any[]) => {
       return runWithAsyncContext(() => {
         if (!args || !args[0]) {
           return originalFunction.apply(thisArg, args);
         }
 
-        const [req] = args;
+        const [req] = args as [NextApiRequest | EdgeRequest];
 
         let maybePromiseResult;
         const cronsKey = 'nextUrl' in req ? req.nextUrl.pathname : req.url;
diff --git a/packages/nextjs/src/config/webpack.ts b/packages/nextjs/src/config/webpack.ts
index 7237d8ce24be..bb5ef56ce4ad 100644
--- a/packages/nextjs/src/config/webpack.ts
+++ b/packages/nextjs/src/config/webpack.ts
@@ -180,8 +180,7 @@ export function constructWebpackConfigFunction(
           }
         }
       } catch (e) {
-        // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
-        if (e.code === 'ENOENT') {
+        if ((e as { code: string }).code === 'ENOENT') {
           // noop if file does not exist
         } else {
           // log but noop
diff --git a/packages/nextjs/test/integration/package.json b/packages/nextjs/test/integration/package.json
index 5c55363fe714..a382ac88f62c 100644
--- a/packages/nextjs/test/integration/package.json
+++ b/packages/nextjs/test/integration/package.json
@@ -21,7 +21,7 @@
     "@types/react": "17.0.47",
     "@types/react-dom": "17.0.17",
     "nock": "^13.1.0",
-    "typescript": "^4.2.4",
+    "typescript": "4.9.5",
     "yargs": "^16.2.0"
   },
   "resolutions": {
diff --git a/packages/nextjs/test/serverSdk.test.ts b/packages/nextjs/test/serverSdk.test.ts
index 1d2dd60d053c..8e73f71b3771 100644
--- a/packages/nextjs/test/serverSdk.test.ts
+++ b/packages/nextjs/test/serverSdk.test.ts
@@ -21,6 +21,7 @@ function findIntegrationByName(integrations: Integration[] = [], name: string):
 describe('Server init()', () => {
   afterEach(() => {
     jest.clearAllMocks();
+    // @ts-ignore for testing
     delete GLOBAL_OBJ.__SENTRY__;
     delete process.env.VERCEL;
   });
diff --git a/packages/node-integration-tests/utils/run-tests.ts b/packages/node-integration-tests/utils/run-tests.ts
index f29aa1a2399b..2c6715f451ab 100644
--- a/packages/node-integration-tests/utils/run-tests.ts
+++ b/packages/node-integration-tests/utils/run-tests.ts
@@ -13,7 +13,7 @@ const workers = os.cpus().map(async (_, i) => {
   while (testPaths.length > 0) {
     const testPath = testPaths.pop();
     console.log(`(Worker ${i}) Running test "${testPath}"`);
-    await new Promise(resolve => {
+    await new Promise<void>(resolve => {
       const jestProcess = childProcess.spawn('jest', ['--runTestsByPath', testPath as string, '--forceExit']);
 
       // We're collecting the output and logging it all at once instead of inheriting stdout and stderr, so that
diff --git a/packages/node/package.json b/packages/node/package.json
index c24c033ab70f..7601f80d172a 100644
--- a/packages/node/package.json
+++ b/packages/node/package.json
@@ -12,6 +12,9 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/npm/types/index.d.ts": ["build/npm/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -23,7 +26,7 @@
     "cookie": "^0.4.1",
     "https-proxy-agent": "^5.0.0",
     "lru_map": "^0.3.3",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "devDependencies": {
     "@types/cookie": "0.3.2",
@@ -38,7 +41,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/node/test/index.test.ts b/packages/node/test/index.test.ts
index 8b035dff7b03..ab9bd41adaf9 100644
--- a/packages/node/test/index.test.ts
+++ b/packages/node/test/index.test.ts
@@ -239,7 +239,7 @@ describe('SentryNode', () => {
         try {
           throw new Error('cause');
         } catch (c) {
-          e.cause = c;
+          (e as any).cause = c;
           captureException(e);
         }
       }
diff --git a/packages/node/test/utils.test.ts b/packages/node/test/utils.test.ts
index 6c8bb3627852..0a62cf011c92 100644
--- a/packages/node/test/utils.test.ts
+++ b/packages/node/test/utils.test.ts
@@ -38,7 +38,7 @@ describe('deepReadDirSync', () => {
         expect(deepReadDirSync(dirPath)).toEqual([]);
         done();
       } catch (error) {
-        done(error);
+        done(error as Error);
       }
     });
   });
diff --git a/packages/opentelemetry-node/package.json b/packages/opentelemetry-node/package.json
index 4cd6cde98e76..d2264e50c1d1 100644
--- a/packages/opentelemetry-node/package.json
+++ b/packages/opentelemetry-node/package.json
@@ -12,6 +12,9 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -38,7 +41,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/overhead-metrics/package.json b/packages/overhead-metrics/package.json
index 910f6b0e001c..2d158435af7b 100644
--- a/packages/overhead-metrics/package.json
+++ b/packages/overhead-metrics/package.json
@@ -32,7 +32,7 @@
     "playwright-core": "^1.29.1",
     "simple-git": "^3.16.0",
     "simple-statistics": "^7.8.0",
-    "typescript": "^4.9.4"
+    "typescript": "4.9.5"
   },
   "devDependencies": {
     "ts-node": "^10.9.1"
diff --git a/packages/react/package.json b/packages/react/package.json
index b0f360019949..c947b4ad4fb1 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -12,6 +12,9 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -20,7 +23,7 @@
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
     "hoist-non-react-statics": "^3.3.2",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "peerDependencies": {
     "react": "15.x || 16.x || 17.x || 18.x"
@@ -54,7 +57,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/react/test/reactrouterv6.4.test.tsx b/packages/react/test/reactrouterv6.4.test.tsx
index fe91dab07979..a01da694ce2f 100644
--- a/packages/react/test/reactrouterv6.4.test.tsx
+++ b/packages/react/test/reactrouterv6.4.test.tsx
@@ -63,6 +63,7 @@ describe('React Router v6.4', () => {
         },
       );
 
+      // @ts-ignore router is fine
       render(<RouterProvider router={router} />);
 
       expect(mockStartTransaction).toHaveBeenCalledTimes(1);
@@ -98,6 +99,7 @@ describe('React Router v6.4', () => {
         },
       );
 
+      // @ts-ignore router is fine
       render(<RouterProvider router={router} />);
 
       expect(mockStartTransaction).toHaveBeenCalledTimes(2);
@@ -135,6 +137,7 @@ describe('React Router v6.4', () => {
         },
       );
 
+      // @ts-ignore router is fine
       render(<RouterProvider router={router} />);
 
       expect(mockStartTransaction).toHaveBeenCalledTimes(2);
@@ -172,6 +175,7 @@ describe('React Router v6.4', () => {
         },
       );
 
+      // @ts-ignore router is fine
       render(<RouterProvider router={router} />);
 
       expect(mockStartTransaction).toHaveBeenCalledTimes(2);
@@ -221,6 +225,7 @@ describe('React Router v6.4', () => {
         },
       );
 
+      // @ts-ignore router is fine
       render(<RouterProvider router={router} />);
 
       expect(mockStartTransaction).toHaveBeenCalledTimes(2);
@@ -254,6 +259,7 @@ describe('React Router v6.4', () => {
         },
       );
 
+      // @ts-ignore router is fine
       render(<RouterProvider router={router} />);
 
       expect(mockStartTransaction).toHaveBeenCalledTimes(1);
diff --git a/packages/remix/package.json b/packages/remix/package.json
index a9bf20778ea8..97722d1b9bbc 100644
--- a/packages/remix/package.json
+++ b/packages/remix/package.json
@@ -16,6 +16,9 @@
   "module": "build/esm/index.server.js",
   "browser": "build/esm/index.client.js",
   "types": "build/types/index.types.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -26,7 +29,7 @@
     "@sentry/react": "7.56.0",
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
-    "tslib": "^1.9.3",
+    "tslib": "^2.4.1 || ^1.9.3",
     "yargs": "^17.6.0"
   },
   "devDependencies": {
@@ -44,7 +47,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/remix/src/utils/instrumentServer.ts b/packages/remix/src/utils/instrumentServer.ts
index ada328badb78..5e0f300bf82e 100644
--- a/packages/remix/src/utils/instrumentServer.ts
+++ b/packages/remix/src/utils/instrumentServer.ts
@@ -19,6 +19,7 @@ import type {
   CreateRequestHandlerFunction,
   DataFunction,
   DataFunctionArgs,
+  EntryContext,
   HandleDocumentRequestFunction,
   ReactRouterDomPkg,
   RemixRequest,
@@ -56,7 +57,7 @@ async function extractResponseError(response: Response): Promise<unknown> {
   return responseData;
 }
 
-async function captureRemixServerException(err: Error, name: string, request: Request): Promise<void> {
+async function captureRemixServerException(err: unknown, name: string, request: Request): Promise<void> {
   // Skip capturing if the thrown error is not a 5xx response
   // https://remix.run/docs/en/v1/api/conventions#throwing-responses-in-loaders
   if (isResponse(err) && err.status < 500) {
@@ -112,7 +113,7 @@ function makeWrappedDocumentRequestFunction(
     request: Request,
     responseStatusCode: number,
     responseHeaders: Headers,
-    context: Record<symbol, unknown>,
+    context: EntryContext,
     loadContext?: Record<string, unknown>,
   ): Promise<Response> {
     let res: Response;
diff --git a/packages/remix/src/utils/serverAdapters/express.ts b/packages/remix/src/utils/serverAdapters/express.ts
index 59cb299e489b..000ad3a00b15 100644
--- a/packages/remix/src/utils/serverAdapters/express.ts
+++ b/packages/remix/src/utils/serverAdapters/express.ts
@@ -142,7 +142,7 @@ async function finishSentryProcessing(res: AugmentedExpressResponse): Promise<vo
 
     // Push `transaction.finish` to the next event loop so open spans have a better chance of finishing before the
     // transaction closes, and make sure to wait until that's done before flushing events
-    await new Promise(resolve => {
+    await new Promise<void>(resolve => {
       setImmediate(() => {
         transaction.finish();
         resolve();
diff --git a/packages/remix/test/integration/package.json b/packages/remix/test/integration/package.json
index 821a4242a04d..fa6db4823643 100644
--- a/packages/remix/test/integration/package.json
+++ b/packages/remix/test/integration/package.json
@@ -20,7 +20,7 @@
     "@types/react": "^17.0.47",
     "@types/react-dom": "^17.0.17",
     "nock": "^13.1.0",
-    "typescript": "^4.2.4"
+    "typescript": "4.9.5"
   },
   "resolutions": {
     "@sentry/browser": "file:../../../browser",
diff --git a/packages/replay-worker/package.json b/packages/replay-worker/package.json
index 3641e152f07e..5a20cafa56f4 100644
--- a/packages/replay-worker/package.json
+++ b/packages/replay-worker/package.json
@@ -5,12 +5,17 @@
   "main": "build/npm/esm/index.js",
   "module": "build/npm/esm/index.js",
   "types": "build/npm/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/npm/types/index.d.ts": ["build/npm/types-ts3.8/index.d.ts"] }
+  },
   "sideEffects": false,
   "private": true,
   "scripts": {
     "build": "run-p build:transpile build:types",
     "build:transpile": "rollup -c rollup.worker.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/npm/types build/npm/types-ts3.8 --to ts3.8",
     "build:dev": "yarn build",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "run-p build:watch",
@@ -38,7 +43,7 @@
   "homepage": "https://docs.sentry.io/platforms/javascript/session-replay/",
   "devDependencies": {
     "@types/pako": "^2.0.0",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "dependencies": {
     "pako": "^2.1.0"
diff --git a/packages/replay-worker/src/handleMessage.ts b/packages/replay-worker/src/handleMessage.ts
index 958797e82cbb..2a00f54a581f 100644
--- a/packages/replay-worker/src/handleMessage.ts
+++ b/packages/replay-worker/src/handleMessage.ts
@@ -54,7 +54,7 @@ export function handleMessage(e: MessageEvent): void {
         id,
         method,
         success: false,
-        response: err.message,
+        response: (err as Error).message,
       });
 
       // eslint-disable-next-line no-console
diff --git a/packages/replay/.eslintignore b/packages/replay/.eslintignore
index c76c6c2d64d1..82f028e93347 100644
--- a/packages/replay/.eslintignore
+++ b/packages/replay/.eslintignore
@@ -4,3 +4,5 @@ demo/build/
 # TODO: Check if we can re-introduce linting in demo
 demo
 metrics
+# For whatever reason, the eslint-ignore comment in this file is not working, so skipping this file
+src/types/rrweb.ts
diff --git a/packages/replay/package.json b/packages/replay/package.json
index f3b1cc69d2b9..2fc49e4e73d6 100644
--- a/packages/replay/package.json
+++ b/packages/replay/package.json
@@ -5,13 +5,18 @@
   "main": "build/npm/cjs/index.js",
   "module": "build/npm/esm/index.js",
   "types": "build/npm/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/npm/types/index.d.ts": ["build/npm/types-ts3.8/index.d.ts"] }
+  },
   "sideEffects": false,
   "scripts": {
     "build": "run-p build:transpile build:types build:bundle",
     "build:transpile": "rollup -c rollup.npm.config.js",
     "build:bundle": "rollup -c rollup.bundle.config.js",
     "build:dev": "run-p build:transpile build:types",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/npm/types build/npm/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:bundle:watch build:types:watch",
     "build:dev:watch": "run-p build:transpile:watch build:types:watch",
     "build:transpile:watch": "yarn build:transpile --watch",
@@ -48,7 +53,7 @@
     "@sentry-internal/rrweb": "1.108.0",
     "@sentry-internal/rrweb-snapshot": "1.108.0",
     "jsdom-worker": "^0.2.1",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "dependencies": {
     "@sentry/core": "7.56.0",
diff --git a/packages/replay/src/coreHandlers/handleFetch.ts b/packages/replay/src/coreHandlers/handleFetch.ts
index 1358701ab8f3..36ec538f1b28 100644
--- a/packages/replay/src/coreHandlers/handleFetch.ts
+++ b/packages/replay/src/coreHandlers/handleFetch.ts
@@ -21,7 +21,7 @@ export function handleFetch(handlerData: HandlerDataFetch): null | ReplayPerform
     name: url,
     data: {
       method,
-      statusCode: response && (response as Response).status,
+      statusCode: response ? (response as Response).status : undefined,
     },
   };
 }
diff --git a/packages/replay/src/util/createPerformanceEntries.ts b/packages/replay/src/util/createPerformanceEntries.ts
index 1dbb07829fb3..f7b02aa324be 100644
--- a/packages/replay/src/util/createPerformanceEntries.ts
+++ b/packages/replay/src/util/createPerformanceEntries.ts
@@ -9,8 +9,6 @@ import type {
   LargestContentfulPaintData,
   NavigationData,
   PaintData,
-  PerformanceNavigationTiming,
-  PerformancePaintTiming,
   ReplayPerformanceEntry,
   ResourceData,
 } from '../types';
diff --git a/packages/replay/src/util/dedupePerformanceEntries.ts b/packages/replay/src/util/dedupePerformanceEntries.ts
index 17933710c91f..22ac369e90a2 100644
--- a/packages/replay/src/util/dedupePerformanceEntries.ts
+++ b/packages/replay/src/util/dedupePerformanceEntries.ts
@@ -1,5 +1,3 @@
-import type { PerformanceNavigationTiming, PerformancePaintTiming } from '../types';
-
 const NAVIGATION_ENTRY_KEYS: Array<keyof PerformanceNavigationTiming> = [
   'name',
   'type',
diff --git a/packages/replay/test/fixtures/performanceEntry/lcp.ts b/packages/replay/test/fixtures/performanceEntry/lcp.ts
index 4db2eb53f565..891e133a981f 100644
--- a/packages/replay/test/fixtures/performanceEntry/lcp.ts
+++ b/packages/replay/test/fixtures/performanceEntry/lcp.ts
@@ -1,5 +1,3 @@
-import type { PerformancePaintTiming } from '../../../src/types';
-
 export function PerformanceEntryLcp(obj?: Partial<PerformancePaintTiming>): PerformancePaintTiming {
   const entry = {
     name: '',
diff --git a/packages/replay/test/fixtures/performanceEntry/navigation.ts b/packages/replay/test/fixtures/performanceEntry/navigation.ts
index d76ebce86538..476ae1d29098 100644
--- a/packages/replay/test/fixtures/performanceEntry/navigation.ts
+++ b/packages/replay/test/fixtures/performanceEntry/navigation.ts
@@ -1,5 +1,3 @@
-import type { PerformanceNavigationTiming } from '../../../src/types';
-
 export function PerformanceEntryNavigation(obj?: Partial<PerformanceNavigationTiming>): PerformanceNavigationTiming {
   const entry = {
     activationStart: 0,
@@ -33,10 +31,10 @@ export function PerformanceEntryNavigation(obj?: Partial<PerformanceNavigationTi
     domComplete: 682.5,
     loadEventStart: 682.5,
     loadEventEnd: 682.6999999284744,
-    type: 'navigate' as NavigationType,
+    type: 'navigate',
     redirectCount: 0,
     ...obj,
-  };
+  } as const;
 
   return {
     ...entry,
diff --git a/packages/serverless/package.json b/packages/serverless/package.json
index 167e3ac936f7..d1b074547bab 100644
--- a/packages/serverless/package.json
+++ b/packages/serverless/package.json
@@ -12,6 +12,9 @@
   "main": "build/npm/cjs/index.js",
   "module": "build/npm/esm/index.js",
   "types": "build/npm/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/npm/types/index.d.ts": ["build/npm/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -22,7 +25,7 @@
     "@sentry/utils": "7.56.0",
     "@types/aws-lambda": "^8.10.62",
     "@types/express": "^4.17.14",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "devDependencies": {
     "@google-cloud/bigquery": "^5.3.0",
@@ -41,7 +44,9 @@
     "build:bundle": "yarn ts-node scripts/buildLambdaLayer.ts",
     "build:dev": "run-p build:transpile build:types",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/npm/types build/npm/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index 1aa37e2101bf..38e844c71226 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -12,6 +12,9 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -20,7 +23,7 @@
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
     "magic-string": "^0.30.0",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "peerDependencies": {
     "svelte": "3.x || 4.x"
@@ -34,7 +37,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/sveltekit/package.json b/packages/sveltekit/package.json
index ef3a0ccbadc5..68c687a4c4d9 100644
--- a/packages/sveltekit/package.json
+++ b/packages/sveltekit/package.json
@@ -35,7 +35,6 @@
     "@sveltejs/kit": "^1.11.0",
     "rollup": "^3.20.2",
     "svelte": "^3.44.0",
-    "typescript": "^4.9.3",
     "vite": "4.0.5"
   },
   "scripts": {
diff --git a/packages/tracing-internal/package.json b/packages/tracing-internal/package.json
index 9c77cb6c6334..1ab646273551 100644
--- a/packages/tracing-internal/package.json
+++ b/packages/tracing-internal/package.json
@@ -12,6 +12,9 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -19,7 +22,7 @@
     "@sentry/core": "7.56.0",
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "devDependencies": {
     "@types/express": "^4.17.14"
@@ -28,7 +31,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "run-p build:transpile:watch build:types:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/tracing-internal/src/browser/metrics/index.ts b/packages/tracing-internal/src/browser/metrics/index.ts
index e7d3b44c75bb..f8cf44894d74 100644
--- a/packages/tracing-internal/src/browser/metrics/index.ts
+++ b/packages/tracing-internal/src/browser/metrics/index.ts
@@ -22,6 +22,7 @@ function msToSec(time: number): number {
 }
 
 function getBrowserPerformanceAPI(): Performance | undefined {
+  // @ts-ignore we want to make sure all of these are available, even if TS is sure they are
   return WINDOW && WINDOW.addEventListener && WINDOW.performance;
 }
 
@@ -39,6 +40,7 @@ let _clsEntry: LayoutShift | undefined;
 export function startTrackingWebVitals(): () => void {
   const performance = getBrowserPerformanceAPI();
   if (performance && browserPerformanceTimeOrigin) {
+    // @ts-ignore we want to make sure all of these are available, even if TS is sure they are
     if (performance.mark) {
       WINDOW.performance.mark('sentry-tracing-init');
     }
diff --git a/packages/tracing-internal/src/browser/web-vitals/lib/getNavigationEntry.ts b/packages/tracing-internal/src/browser/web-vitals/lib/getNavigationEntry.ts
index 9aaa8939b6dc..75ec564eb5de 100644
--- a/packages/tracing-internal/src/browser/web-vitals/lib/getNavigationEntry.ts
+++ b/packages/tracing-internal/src/browser/web-vitals/lib/getNavigationEntry.ts
@@ -31,6 +31,7 @@ const getNavigationEntryFromPerformanceTiming = (): NavigationTimingPolyfillEntr
 
   for (const key in timing) {
     if (key !== 'navigationStart' && key !== 'toJSON') {
+      // eslint-disable-next-line deprecation/deprecation
       navigationEntry[key] = Math.max((timing[key as keyof PerformanceTiming] as number) - timing.navigationStart, 0);
     }
   }
diff --git a/packages/tracing-internal/src/node/integrations/prisma.ts b/packages/tracing-internal/src/node/integrations/prisma.ts
index ab6fd1f1ae5b..458e0f304ebe 100644
--- a/packages/tracing-internal/src/node/integrations/prisma.ts
+++ b/packages/tracing-internal/src/node/integrations/prisma.ts
@@ -40,7 +40,7 @@ interface PrismaClient {
 }
 
 function isValidPrismaClient(possibleClient: unknown): possibleClient is PrismaClient {
-  return possibleClient && !!(possibleClient as PrismaClient)['$use'];
+  return !!possibleClient && !!(possibleClient as PrismaClient)['$use'];
 }
 
 /** Tracing integration for @prisma/client package */
diff --git a/packages/tracing/package.json b/packages/tracing/package.json
index c177599cdcfe..2113c78809f8 100644
--- a/packages/tracing/package.json
+++ b/packages/tracing/package.json
@@ -12,6 +12,9 @@
   "main": "build/npm/cjs/index.js",
   "module": "build/npm/esm/index.js",
   "types": "build/npm/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/npm/types/index.d.ts": ["build/npm/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -30,7 +33,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "run-p build:transpile build:types",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/npm/types build/npm/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "run-p build:transpile:watch build:types:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/types/package.json b/packages/types/package.json
index 736924037fc0..77f343f59de0 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -12,6 +12,9 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -19,7 +22,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "yarn build",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/typescript/package.json b/packages/typescript/package.json
index 44c0379492fc..43578348e184 100644
--- a/packages/typescript/package.json
+++ b/packages/typescript/package.json
@@ -11,7 +11,7 @@
     "access": "public"
   },
   "peerDependencies": {
-    "typescript": "3.8.3"
+    "typescript": "4.9.5"
   },
   "scripts": {
     "clean": "yarn rimraf sentry-internal-typescript-*.tgz",
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 625cf7652e13..524174880ac1 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -12,12 +12,15 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
   "dependencies": {
     "@sentry/types": "7.56.0",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "devDependencies": {
     "@types/array.prototype.flat": "^1.2.1",
@@ -29,7 +32,9 @@
     "build:dev": "yarn build",
     "build:transpile": "yarn ts-node scripts/buildRollup.ts",
     "build:transpile:uncached": "yarn ts-node scripts/buildRollup.ts",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "yarn build:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/utils/src/envelope.ts b/packages/utils/src/envelope.ts
index 66adb7e78ebd..e91aefdbab5b 100644
--- a/packages/utils/src/envelope.ts
+++ b/packages/utils/src/envelope.ts
@@ -34,7 +34,7 @@ export function createEnvelope<E extends Envelope>(headers: E[0], items: E[1] =
  */
 export function addItemToEnvelope<E extends Envelope>(envelope: E, newItem: E[1][number]): E {
   const [headers, items] = envelope;
-  return [headers, [...items, newItem]] as E;
+  return [headers, [...items, newItem]] as unknown as E;
 }
 
 /**
diff --git a/packages/utils/test/envelope.test.ts b/packages/utils/test/envelope.test.ts
index 9649da0e2108..10cdcc2cab73 100644
--- a/packages/utils/test/envelope.test.ts
+++ b/packages/utils/test/envelope.test.ts
@@ -1,4 +1,4 @@
-import type { EventEnvelope } from '@sentry/types';
+import type { Event, EventEnvelope } from '@sentry/types';
 import { TextDecoder, TextEncoder } from 'util';
 
 const encoder = new TextEncoder();
@@ -68,8 +68,8 @@ describe('envelope', () => {
     });
 
     it("doesn't throw when being passed a an envelope that contains a circular item payload", () => {
-      const chicken: { egg?: unknown } = {};
-      const egg = { chicken };
+      const chicken: { egg?: any } = {};
+      const egg = { chicken } as unknown as Event;
       chicken.egg = chicken;
 
       const env = createEnvelope<EventEnvelope>({ event_id: 'aa3ff046696b4bc6b609ce6d28fde9e2', sent_at: '123' }, [
diff --git a/packages/utils/test/worldwide.test.ts b/packages/utils/test/worldwide.test.ts
index 6137c95c093b..52203a248d69 100644
--- a/packages/utils/test/worldwide.test.ts
+++ b/packages/utils/test/worldwide.test.ts
@@ -3,6 +3,7 @@ import { GLOBAL_OBJ } from '../src/worldwide';
 describe('GLOBAL_OBJ', () => {
   test('should return the same object', () => {
     const backup = global.process;
+    // @ts-ignore for testing
     delete global.process;
     const first = GLOBAL_OBJ;
     const second = GLOBAL_OBJ;
diff --git a/packages/vue/package.json b/packages/vue/package.json
index b82ca6ae4e61..875f5ce643a9 100644
--- a/packages/vue/package.json
+++ b/packages/vue/package.json
@@ -12,6 +12,9 @@
   "main": "build/cjs/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/types/index.d.ts": ["build/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -20,7 +23,7 @@
     "@sentry/core": "7.56.0",
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "peerDependencies": {
     "vue": "2.x || 3.x"
@@ -32,7 +35,9 @@
     "build": "run-p build:transpile build:types",
     "build:dev": "run-p build:transpile build:types",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/types build/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:types:watch",
     "build:dev:watch": "run-p build:transpile:watch build:types:watch",
     "build:transpile:watch": "rollup -c rollup.npm.config.js --watch",
diff --git a/packages/wasm/package.json b/packages/wasm/package.json
index fcd2bef8a637..674fa58e4dd1 100644
--- a/packages/wasm/package.json
+++ b/packages/wasm/package.json
@@ -12,6 +12,9 @@
   "main": "build/npm/cjs/index.js",
   "module": "build/npm/esm/index.js",
   "types": "build/npm/types/index.d.ts",
+  "typesVersions": {
+    "<4.9": { "build/npm/types/index.d.ts": ["build/npm/types-ts3.8/index.d.ts"] }
+  },
   "publishConfig": {
     "access": "public"
   },
@@ -19,14 +22,16 @@
     "@sentry/browser": "7.56.0",
     "@sentry/types": "7.56.0",
     "@sentry/utils": "7.56.0",
-    "tslib": "^1.9.3"
+    "tslib": "^2.4.1 || ^1.9.3"
   },
   "scripts": {
     "build": "run-p build:transpile build:bundle build:types",
     "build:bundle": "rollup --config rollup.bundle.config.js",
     "build:dev": "run-p build:transpile build:types",
     "build:transpile": "rollup -c rollup.npm.config.js",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:types": "run-s build:types:core build:types:downlevel",
+    "build:types:core": "tsc -p tsconfig.types.json",
+    "build:types:downlevel": "yarn downlevel-dts build/npm/types build/npm/types-ts3.8 --to ts3.8",
     "build:watch": "run-p build:transpile:watch build:bundle:watch build:types:watch",
     "build:bundle:watch": "rollup --config rollup.bundle.config.js --watch",
     "build:dev:watch": "run-p build:transpile:watch build:types:watch",
diff --git a/scripts/ensure-bundle-deps.ts b/scripts/ensure-bundle-deps.ts
index 8be6377ee4e1..4e61a6ecf993 100644
--- a/scripts/ensure-bundle-deps.ts
+++ b/scripts/ensure-bundle-deps.ts
@@ -129,7 +129,7 @@ function checkForBundleDeps(packagesDir: string, dependencyDirs: string[]): bool
  * Wait the given number of milliseconds before continuing.
  */
 async function sleep(ms: number): Promise<void> {
-  await new Promise(resolve =>
+  await new Promise<void>(resolve =>
     setTimeout(() => {
       resolve();
     }, ms),
diff --git a/scripts/verify-packages-versions.js b/scripts/verify-packages-versions.js
index 9e24e8090096..9c54cf2020c4 100644
--- a/scripts/verify-packages-versions.js
+++ b/scripts/verify-packages-versions.js
@@ -1,6 +1,6 @@
 const pkg = require('../package.json');
 
-const TYPESCRIPT_VERSION = '3.8.3';
+const TYPESCRIPT_VERSION = '4.9.5';
 
 if (pkg.devDependencies.typescript !== TYPESCRIPT_VERSION) {
   console.error(`
diff --git a/yarn.lock b/yarn.lock
index b4ab26edf619..224622dc7189 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11128,6 +11128,15 @@ dotenv@~10.0.0:
   resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-10.0.0.tgz#3d4227b8fb95f81096cdd2b66653fb2c7085ba81"
   integrity sha512-rlBi9d8jpv9Sf1klPjNfFAuWDjKLwTIJJ/VxtoTwIR6hnZxcEOQCZg2oIL3MWBYw5GpUDKOEnND7LXTbIpQ03Q==
 
+downlevel-dts@~0.11.0:
+  version "0.11.0"
+  resolved "https://registry.yarnpkg.com/downlevel-dts/-/downlevel-dts-0.11.0.tgz#514a2d723009c5845730c1db6c994484c596ed9c"
+  integrity sha512-vo835pntK7kzYStk7xUHDifiYJvXxVhUapt85uk2AI94gUUAQX9HNRtrcMHNSc3YHJUEHGbYIGsM99uIbgAtxw==
+  dependencies:
+    semver "^7.3.2"
+    shelljs "^0.8.3"
+    typescript next
+
 duplexer3@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/duplexer3/-/duplexer3-0.1.4.tgz#ee01dd1cac0ed3cbc7fdbea37dc0a8f1ce002ce2"
@@ -24140,7 +24149,7 @@ shell-quote@1.7.2, shell-quote@^1.6.1:
   resolved "https://registry.yarnpkg.com/shell-quote/-/shell-quote-1.7.2.tgz#67a7d02c76c9da24f99d20808fcaded0e0e04be2"
   integrity sha512-mRz/m/JVscCrkMyPqHc/bczi3OQHkLTqXHEFu0zDhK/qfv3UcOA4SVmRCLmos4bhjr9ekVQubj/R7waKapmiQg==
 
-shelljs@^0.8.4:
+shelljs@^0.8.3, shelljs@^0.8.4:
   version "0.8.5"
   resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.8.5.tgz#de055408d8361bed66c669d2f000538ced8ee20c"
   integrity sha512-TiwcRcrkhHvbrZbnRcFYMLl30Dfov3HKqzp5tO5b4pt6G/SezKcYhmDg15zXVBswHmctSAQKznqNW2LO5tTDow==
@@ -26244,20 +26253,20 @@ tslib@2.3.0:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.3.0.tgz#803b8cdab3e12ba581a4ca41c8839bbb0dacb09e"
   integrity sha512-N82ooyxVNm6h1riLCoyS9e3fuJ3AMG2zIZs2Gd1ATcSFjSA23Q0fzjjZeh0jbJvWVDZ0cJT8yaNNaaXHzueNjg==
 
-tslib@^1.10.0, tslib@^1.8.1, tslib@^1.9.0, tslib@^1.9.3:
+tslib@2.4.1:
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.4.1.tgz#0d0bfbaac2880b91e22df0768e55be9753a5b17e"
+  integrity sha512-tGyy4dAjRIEwI7BzsB0lynWgOpfqjUdq91XXAlIWD2OwKBH7oCl/GZG/HT4BOHrTlPMOASlMQ7veyTqpmRcrNA==
+
+tslib@^1.10.0, tslib@^1.8.1, tslib@^1.9.0:
   version "1.14.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.14.1.tgz#cf2d38bdc34a134bcaf1091c41f6619e2f672d00"
   integrity sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==
 
-tslib@^2.0.0, tslib@^2.0.1, tslib@^2.0.3, tslib@^2.1.0, tslib@^2.3.0, tslib@^2.3.1, tslib@^2.4.0:
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.4.0.tgz#7cecaa7f073ce680a05847aa77be941098f36dc3"
-  integrity sha512-d6xOpEDfsi2CZVlPQzGeux8XMwLT9hssAsaPYExaQMuYskwb+x1x7J371tWlbBdWHroy99KnVB6qIkUbs5X3UQ==
-
-tslib@^2.2.0:
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.5.0.tgz#42bfed86f5787aeb41d031866c8f402429e0fddf"
-  integrity sha512-336iVw3rtn2BUK7ORdIAHTyxHGRIHVReokCR3XjbckJMK7ms8FysBfhLR8IXnAgy7T0PTPNBWKiH514FOW/WSg==
+tslib@^2.0.0, tslib@^2.0.1, tslib@^2.0.3, tslib@^2.1.0, tslib@^2.2.0, tslib@^2.3.0, tslib@^2.3.1, tslib@^2.4.0, tslib@^2.4.1, "tslib@^2.4.1 || ^1.9.3":
+  version "2.5.2"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.5.2.tgz#1b6f07185c881557b0ffa84b111a0106989e8338"
+  integrity sha512-5svOrSA2w3iGFDs1HibEVBGbDrAY82bFQ3HZ3ixB+88nsbsWQoKqDRb5UBYAUPEzbBn6dAp5gRNXglySbx1MlA==
 
 tsutils@^3.0.0, tsutils@^3.17.1, tsutils@^3.21.0:
   version "3.21.0"
@@ -26405,45 +26414,30 @@ typescript-memoize@^1.0.0-alpha.3, typescript-memoize@^1.0.1:
   resolved "https://registry.yarnpkg.com/typescript-memoize/-/typescript-memoize-1.0.1.tgz#0a8199aa28f6fe18517f6e9308ef7bfbe9a98d59"
   integrity sha512-oJNge1qUrOK37d5Y6Ly2txKeuelYVsFtNF6U9kXIN7juudcQaHJQg2MxLOy0CqtkW65rVDYuTCOjnSIVPd8z3w==
 
-typescript@3.8.3:
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
-  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
-
 typescript@4.0.2:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.2.tgz#7ea7c88777c723c681e33bf7988be5d008d05ac2"
   integrity sha512-e4ERvRV2wb+rRZ/IQeb3jm2VxBsirQLpQhdxplZ2MEzGvDkkMmPglecnNDfSUBivMjP93vRbngYYDQqQ/78bcQ==
 
-typescript@4.3.5, typescript@~4.3.5:
+typescript@4.3.5:
   version "4.3.5"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
   integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==
 
-"typescript@^3 || ^4", typescript@^4.5.2:
-  version "4.9.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.3.tgz#3aea307c1746b8c384435d8ac36b8a2e580d85db"
-  integrity sha512-CIfGzTelbKNEnLpLdGFgdyKhG23CKdKgQPOBc+OUNrkJ2vr+KSzsSV5kq5iWhEQbok+quxgGzrAtGWCyU7tHnA==
-
-typescript@^3.9.5, typescript@^3.9.7:
-  version "3.9.9"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.9.tgz#e69905c54bc0681d0518bd4d587cc6f2d0b1a674"
-  integrity sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==
-
-typescript@^4.9.3, typescript@^4.9.4:
+typescript@4.9.5, "typescript@^3 || ^4":
   version "4.9.5"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.5.tgz#095979f9bcc0d09da324d58d03ce8f8374cbe65a"
   integrity sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==
 
-typescript@~4.0.2:
-  version "4.0.8"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.8.tgz#5739105541db80a971fdbd0d56511d1a6f17d37f"
-  integrity sha512-oz1765PN+imfz1MlZzSZPtC/tqcwsCyIYA8L47EkRnRW97ztRk83SzMiWLrnChC0vqoYxSU1fcFUDA5gV/ZiPg==
-
-typescript@~4.5.2:
-  version "4.5.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.5.5.tgz#d8c953832d28924a9e3d37c73d729c846c5896f3"
-  integrity sha512-TCTIul70LyWe6IJWT8QSYeA54WQe8EjQFU4wY52Fasj5UKx88LNYKCgBEHcOMOrFF1rKGbD8v/xcNWVUq9SymA==
+typescript@^3.9.5, typescript@^3.9.7:
+  version "3.9.10"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.10.tgz#70f3910ac7a51ed6bef79da7800690b19bf778b8"
+  integrity sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q==
+
+typescript@next:
+  version "5.2.0-dev.20230530"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.2.0-dev.20230530.tgz#4251ade97a9d8a86850c4d5c3c4f3e1cb2ccf52c"
+  integrity sha512-bIoMajCZWzLB+pWwncaba/hZc6dRnw7x8T/fenOnP9gYQB/gc4xdm48AXp5SH5I/PvvSeZ/dXkUMtc8s8BiDZw==
 
 typeson-registry@^1.0.0-alpha.20:
   version "1.0.0-alpha.39"