diff --git a/examples/reproduction-template/package.json b/examples/reproduction-template/package.json
index 3f218a7d516e7..dda04e8c51342 100644
--- a/examples/reproduction-template/package.json
+++ b/examples/reproduction-template/package.json
@@ -7,8 +7,8 @@
   },
   "dependencies": {
     "next": "canary",
-    "react": "19.0.0-rc-e4953922-20240919",
-    "react-dom": "19.0.0-rc-e4953922-20240919"
+    "react": "19.0.0-rc-5d19e1c8-20240923",
+    "react-dom": "19.0.0-rc-5d19e1c8-20240923"
   },
   "devDependencies": {
     "@types/node": "20.12.12",
diff --git a/packages/create-next-app/templates/index.ts b/packages/create-next-app/templates/index.ts
index 9a34b04d20158..6e91c597690bb 100644
--- a/packages/create-next-app/templates/index.ts
+++ b/packages/create-next-app/templates/index.ts
@@ -13,7 +13,7 @@ import { GetTemplateFileArgs, InstallTemplateArgs } from "./types";
 
 // Do not rename or format. sync-react script relies on this line.
 // prettier-ignore
-const nextjsReactPeerVersion = "19.0.0-rc-e4953922-20240919";
+const nextjsReactPeerVersion = "19.0.0-rc-5d19e1c8-20240923";
 
 /**
  * Get the file path for a given file in a template, e.g. "next.config.js".
diff --git a/packages/next/package.json b/packages/next/package.json
index 299b0213e65f9..692b8d58eb9ff 100644
--- a/packages/next/package.json
+++ b/packages/next/package.json
@@ -107,8 +107,8 @@
     "@opentelemetry/api": "^1.1.0",
     "@playwright/test": "^1.41.2",
     "babel-plugin-react-compiler": "*",
-    "react": "19.0.0-rc-e4953922-20240919",
-    "react-dom": "19.0.0-rc-e4953922-20240919",
+    "react": "19.0.0-rc-5d19e1c8-20240923",
+    "react-dom": "19.0.0-rc-5d19e1c8-20240923",
     "sass": "^1.3.0"
   },
   "peerDependenciesMeta": {
diff --git a/run-tests.js b/run-tests.js
index 49889e6f98768..8a0e6cebb18ec 100644
--- a/run-tests.js
+++ b/run-tests.js
@@ -20,7 +20,7 @@ const { getTestFilter } = require('./test/get-test-filter')
 
 // Do not rename or format. sync-react script relies on this line.
 // prettier-ignore
-const nextjsReactPeerVersion = "19.0.0-rc-e4953922-20240919";
+const nextjsReactPeerVersion = "19.0.0-rc-5d19e1c8-20240923";
 
 let argv = require('yargs/yargs')(process.argv.slice(2))
   .string('type')
diff --git a/test/.stats-app/package.json b/test/.stats-app/package.json
index af516c52a9080..f3cbdc2a012f0 100644
--- a/test/.stats-app/package.json
+++ b/test/.stats-app/package.json
@@ -4,8 +4,8 @@
   "license": "MIT",
   "dependencies": {
     "next": "latest",
-    "react": "19.0.0-rc-e4953922-20240919",
-    "react-dom": "19.0.0-rc-e4953922-20240919"
+    "react": "19.0.0-rc-5d19e1c8-20240923",
+    "react-dom": "19.0.0-rc-5d19e1c8-20240923"
   },
   "engines": {
     "node": ">=18.18.0"
diff --git a/test/e2e/next-test/first-time-setup-js/package.json b/test/e2e/next-test/first-time-setup-js/package.json
index 5020622248f0a..25ab27fa9618d 100644
--- a/test/e2e/next-test/first-time-setup-js/package.json
+++ b/test/e2e/next-test/first-time-setup-js/package.json
@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "next": "canary",
-    "react": "19.0.0-rc-e4953922-20240919",
-    "react-dom": "19.0.0-rc-e4953922-20240919"
+    "react": "19.0.0-rc-5d19e1c8-20240923",
+    "react-dom": "19.0.0-rc-5d19e1c8-20240923"
   }
 }
diff --git a/test/e2e/next-test/first-time-setup-ts/package.json b/test/e2e/next-test/first-time-setup-ts/package.json
index a16084f41a528..216b01d931d3f 100644
--- a/test/e2e/next-test/first-time-setup-ts/package.json
+++ b/test/e2e/next-test/first-time-setup-ts/package.json
@@ -8,8 +8,8 @@
   },
   "dependencies": {
     "next": "canary",
-    "react": "19.0.0-rc-e4953922-20240919",
-    "react-dom": "19.0.0-rc-e4953922-20240919"
+    "react": "19.0.0-rc-5d19e1c8-20240923",
+    "react-dom": "19.0.0-rc-5d19e1c8-20240923"
   },
   "devDependencies": {
     "@types/react": "^18",
diff --git a/test/lib/next-modes/base.ts b/test/lib/next-modes/base.ts
index 95dd439849ca0..3097edea97ef6 100644
--- a/test/lib/next-modes/base.ts
+++ b/test/lib/next-modes/base.ts
@@ -51,7 +51,7 @@ type OmitFirstArgument<F> = F extends (
 
 // Do not rename or format. sync-react script relies on this line.
 // prettier-ignore
-const nextjsReactPeerVersion = "19.0.0-rc-e4953922-20240919";
+const nextjsReactPeerVersion = "19.0.0-rc-5d19e1c8-20240923";
 
 export class NextInstance {
   protected files: FileRef | { [filename: string]: string | FileRef }