diff --git a/package.json b/package.json
index 38bf708029e..f600e4ba40e 100644
--- a/package.json
+++ b/package.json
@@ -132,7 +132,7 @@
         "matrix-encrypt-attachment": "^1.0.3",
         "matrix-events-sdk": "0.0.1",
         "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
-        "matrix-widget-api": "^1.10.0",
+        "matrix-widget-api": "^1.14.0",
         "memoize-one": "^6.0.0",
         "mime": "^4.0.4",
         "oidc-client-ts": "^3.0.1",
diff --git a/src/stores/widgets/StopGapWidgetDriver.ts b/src/stores/widgets/StopGapWidgetDriver.ts
index afd0a85cfc5..42abdc801db 100644
--- a/src/stores/widgets/StopGapWidgetDriver.ts
+++ b/src/stores/widgets/StopGapWidgetDriver.ts
@@ -26,7 +26,6 @@ import {
     type IWidgetApiErrorResponseDataDetails,
     type ISearchUserDirectoryResult,
     type IGetMediaConfigResult,
-    type UpdateDelayedEventAction,
 } from "matrix-widget-api";
 import {
     ClientEvent,
@@ -425,12 +424,34 @@ export class StopGapWidgetDriver extends WidgetDriver {
     /**
      * @experimental Part of MSC4140 & MSC4157
      */
-    public async updateDelayedEvent(delayId: string, action: UpdateDelayedEventAction): Promise<void> {
+    public async cancelScheduledDelayedEvent(delayId: string): Promise<void> {
         const client = MatrixClientPeg.get();
 
         if (!client) throw new Error("Not in a room or not attached to a client");
 
-        await client._unstable_updateDelayedEvent(delayId, action);
+        await client._unstable_cancelScheduledDelayedEvent(delayId);
+    }
+
+    /**
+     * @experimental Part of MSC4140 & MSC4157
+     */
+    public async restartScheduledDelayedEvent(delayId: string): Promise<void> {
+        const client = MatrixClientPeg.get();
+
+        if (!client) throw new Error("Not in a room or not attached to a client");
+
+        await client._unstable_restartScheduledDelayedEvent(delayId);
+    }
+
+    /**
+     * @experimental Part of MSC4140 & MSC4157
+     */
+    public async sendScheduledDelayedEvent(delayId: string): Promise<void> {
+        const client = MatrixClientPeg.get();
+
+        if (!client) throw new Error("Not in a room or not attached to a client");
+
+        await client._unstable_sendScheduledDelayedEvent(delayId);
     }
 
     /**
diff --git a/test/test-utils/test-utils.ts b/test/test-utils/test-utils.ts
index 8f70d089dd5..a0fa715bad0 100644
--- a/test/test-utils/test-utils.ts
+++ b/test/test-utils/test-utils.ts
@@ -276,7 +276,9 @@ export function createTestClient(): MatrixClient {
 
         _unstable_sendDelayedEvent: jest.fn(),
         _unstable_sendDelayedStateEvent: jest.fn(),
-        _unstable_updateDelayedEvent: jest.fn(),
+        _unstable_cancelScheduledDelayedEvent: jest.fn(),
+        _unstable_restartScheduledDelayedEvent: jest.fn(),
+        _unstable_sendScheduledDelayedEvent: jest.fn(),
 
         searchUserDirectory: jest.fn().mockResolvedValue({ limited: false, results: [] }),
         setDeviceVerified: jest.fn(),
diff --git a/test/unit-tests/stores/widgets/StopGapWidgetDriver-test.ts b/test/unit-tests/stores/widgets/StopGapWidgetDriver-test.ts
index d8d115411d4..9b6411b134a 100644
--- a/test/unit-tests/stores/widgets/StopGapWidgetDriver-test.ts
+++ b/test/unit-tests/stores/widgets/StopGapWidgetDriver-test.ts
@@ -27,7 +27,6 @@ import {
     SimpleObservable,
     OpenIDRequestState,
     type IOpenIDUpdate,
-    UpdateDelayedEventAction,
 } from "matrix-widget-api";
 import {
     type ApprovalOpts,
@@ -554,24 +553,40 @@ describe("StopGapWidgetDriver", () => {
             driver = mkDefaultDriver();
         });
 
-        it("updates delayed events", async () => {
-            client._unstable_updateDelayedEvent.mockResolvedValue({});
-            for (const action of [
-                UpdateDelayedEventAction.Cancel,
-                UpdateDelayedEventAction.Restart,
-                UpdateDelayedEventAction.Send,
-            ]) {
-                await expect(driver.updateDelayedEvent("id", action)).resolves.toBeUndefined();
-                expect(client._unstable_updateDelayedEvent).toHaveBeenCalledWith("id", action);
-            }
+        it("can cancel scheduled delayed events", async () => {
+            client._unstable_cancelScheduledDelayedEvent.mockResolvedValue({});
+            await expect(driver.cancelScheduledDelayedEvent("id")).resolves.toBeUndefined();
+            expect(client._unstable_cancelScheduledDelayedEvent).toHaveBeenCalledWith("id");
+        });
+
+        it("can restart scheduled delayed events", async () => {
+            client._unstable_restartScheduledDelayedEvent.mockResolvedValue({});
+            await expect(driver.restartScheduledDelayedEvent("id")).resolves.toBeUndefined();
+            expect(client._unstable_restartScheduledDelayedEvent).toHaveBeenCalledWith("id");
+        });
+
+        it("can send scheduled delayed events", async () => {
+            client._unstable_sendScheduledDelayedEvent.mockResolvedValue({});
+            await expect(driver.sendScheduledDelayedEvent("id")).resolves.toBeUndefined();
+            expect(client._unstable_sendScheduledDelayedEvent).toHaveBeenCalledWith("id");
         });
 
-        it("fails to update delayed events", async () => {
+        it("fails to cancel scheduled delayed events", async () => {
+            const errorMessage = "Cannot cancel this delayed event";
+            client._unstable_cancelScheduledDelayedEvent.mockRejectedValue(new Error(errorMessage));
+            await expect(driver.cancelScheduledDelayedEvent("id")).rejects.toThrow(errorMessage);
+        });
+
+        it("fails to restart scheduled delayed events", async () => {
             const errorMessage = "Cannot restart this delayed event";
-            client._unstable_updateDelayedEvent.mockRejectedValue(new Error(errorMessage));
-            await expect(driver.updateDelayedEvent("id", UpdateDelayedEventAction.Restart)).rejects.toThrow(
-                errorMessage,
-            );
+            client._unstable_restartScheduledDelayedEvent.mockRejectedValue(new Error(errorMessage));
+            await expect(driver.restartScheduledDelayedEvent("id")).rejects.toThrow(errorMessage);
+        });
+
+        it("fails to send scheduled delayed events", async () => {
+            const errorMessage = "Cannot send this delayed event";
+            client._unstable_sendScheduledDelayedEvent.mockRejectedValue(new Error(errorMessage));
+            await expect(driver.sendScheduledDelayedEvent("id")).rejects.toThrow(errorMessage);
         });
     });
 
diff --git a/yarn.lock b/yarn.lock
index 20e11c7b121..25fcbca2b75 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4089,7 +4089,7 @@
     classnames "^2.5.1"
     vaul "^1.0.0"
 
-"@vector-im/matrix-wysiwyg-wasm@link:../../Library/Caches/Yarn/v6/npm-@vector-im-matrix-wysiwyg-2.40.0-53c9ca5ea907d91e4515da64f20a82e5586b882c-integrity/node_modules/bindings/wysiwyg-wasm":
+"@vector-im/matrix-wysiwyg-wasm@link:../../.cache/yarn/v6/npm-@vector-im-matrix-wysiwyg-2.40.0-53c9ca5ea907d91e4515da64f20a82e5586b882c-integrity/node_modules/bindings/wysiwyg-wasm":
   version "0.0.0"
   uid ""
 
@@ -4098,7 +4098,7 @@
   resolved "https://registry.yarnpkg.com/@vector-im/matrix-wysiwyg/-/matrix-wysiwyg-2.40.0.tgz#53c9ca5ea907d91e4515da64f20a82e5586b882c"
   integrity sha512-8LRFLs5PEKYs4lOL7aJ4lL/hGCrvEvOYkCR3JggXYXDVMtX4LmfdlKYucSAe98pCmqAAbLRvlRcR1bTOYvM8ug==
   dependencies:
-    "@vector-im/matrix-wysiwyg-wasm" "link:../../../.cache/yarn/v6/npm-@vector-im-matrix-wysiwyg-2.40.0-53c9ca5ea907d91e4515da64f20a82e5586b882c-integrity/node_modules/bindings/wysiwyg-wasm"
+    "@vector-im/matrix-wysiwyg-wasm" "link:../../.cache/yarn/v6/npm-@vector-im-matrix-wysiwyg-2.40.0-53c9ca5ea907d91e4515da64f20a82e5586b882c-integrity/node_modules/bindings/wysiwyg-wasm"
 
 "@vitest/expect@3.2.4":
   version "3.2.4"
@@ -9680,7 +9680,7 @@ matrix-events-sdk@0.0.1:
 
 "matrix-js-sdk@github:matrix-org/matrix-js-sdk#develop":
   version "39.1.2"
-  resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/b489bb15cf3f5de8024a3e31ccb36cf294f82887"
+  resolved "https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/df88edfda0aa00ad1d574e367f024db9a927e96b"
   dependencies:
     "@babel/runtime" "^7.12.5"
     "@matrix-org/matrix-sdk-crypto-wasm" "^15.3.0"
@@ -9690,7 +9690,7 @@ matrix-events-sdk@0.0.1:
     jwt-decode "^4.0.0"
     loglevel "^1.9.2"
     matrix-events-sdk "0.0.1"
-    matrix-widget-api "^1.10.0"
+    matrix-widget-api "^1.14.0"
     oidc-client-ts "^3.0.1"
     p-retry "7"
     sdp-transform "^3.0.0"
@@ -9708,10 +9708,10 @@ matrix-web-i18n@^3.2.1, matrix-web-i18n@^3.4.0:
     minimist "^1.2.8"
     walk "^2.3.15"
 
-matrix-widget-api@^1.10.0:
-  version "1.13.1"
-  resolved "https://registry.yarnpkg.com/matrix-widget-api/-/matrix-widget-api-1.13.1.tgz#5b1caeed2fc58148bcd2984e0546d2d06a1713ad"
-  integrity sha512-mkOHUVzaN018TCbObfGOSaMW2GoUxOfcxNNlTVx5/HeMk3OSQPQM0C9oEME5Liiv/dBUoSrEB64V8wF7e/gb1w==
+matrix-widget-api@^1.14.0:
+  version "1.14.0"
+  resolved "https://registry.yarnpkg.com/matrix-widget-api/-/matrix-widget-api-1.14.0.tgz#aa90c40ace27d3165299f7dbc760a53001ce1446"
+  integrity sha512-DDvZGOQhI/rilPWg5VlLN7pHIsPt0Jt14lsuHDP+KU+fmpAQNITJ6aIld1ZoXWsrVGv2PS3x6K/MHtfruIOQJQ==
   dependencies:
     "@types/events" "^3.0.0"
     events "^3.2.0"