diff --git a/extensions/package-lock.json b/extensions/package-lock.json
index aa07b93e52e..b902b30a514 100644
--- a/extensions/package-lock.json
+++ b/extensions/package-lock.json
@@ -10,7 +10,7 @@
       "hasInstallScript": true,
       "license": "MIT",
       "dependencies": {
-        "typescript": "5.6.3"
+        "typescript": "^5.7.0-dev.20241030"
       },
       "devDependencies": {
         "@parcel/watcher": "2.1.0",
@@ -606,9 +606,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.6.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.6.3.tgz",
-      "integrity": "sha512-hjcS1mhfuyi4WW8IWtjP7brDrG2cuDZukyrYrSauoXGNgx0S7zceP07adYkJycEr56BOUTNPzbInooiN3fn1qw==",
+      "version": "5.7.0-dev.20241030",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.7.0-dev.20241030.tgz",
+      "integrity": "sha512-GTDPhqdtcO+8WOPjYAp33e8dtlZN6pY9Z89aVLH1PsaiA1yaWNPVNCQ1KRCc1BK/jQGJVVBhu0fxWGSLjAE1Dw==",
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
diff --git a/extensions/package.json b/extensions/package.json
index a1a22494789..08951c240c7 100644
--- a/extensions/package.json
+++ b/extensions/package.json
@@ -4,7 +4,7 @@
   "license": "MIT",
   "description": "Dependencies shared by all extensions",
   "dependencies": {
-    "typescript": "5.6.3"
+    "typescript": "^5.7.0-dev.20241030"
   },
   "scripts": {
     "postinstall": "node ./postinstall.mjs"
diff --git a/extensions/typescript-language-features/src/languageFeatures/copilotRelated.ts b/extensions/typescript-language-features/src/languageFeatures/copilotRelated.ts
index f1ceac1a584..632b04798cb 100644
--- a/extensions/typescript-language-features/src/languageFeatures/copilotRelated.ts
+++ b/extensions/typescript-language-features/src/languageFeatures/copilotRelated.ts
@@ -70,12 +70,10 @@ export function register(
 						if (!file) {
 							return { entries: [] };
 						}
-						// @ts-expect-error until ts5.7
 						const response = await client.execute('copilotRelated', { file, }, token) as Proto.CopilotRelatedResponse;
 						if (response.type !== 'response' || !response.body) {
 							return { entries: [] };
 						}
-						// @ts-expect-error until ts5.7
 						return { entries: response.body.relatedFiles.map(f => client.toResource(f)), traits: [] };
 					}));
 				}
diff --git a/extensions/typescript-language-features/src/tsServer/protocol/protocol.d.ts b/extensions/typescript-language-features/src/tsServer/protocol/protocol.d.ts
index cd70b6b7d41..747e7c22e37 100644
--- a/extensions/typescript-language-features/src/tsServer/protocol/protocol.d.ts
+++ b/extensions/typescript-language-features/src/tsServer/protocol/protocol.d.ts
@@ -19,18 +19,5 @@ declare module '../../../../node_modules/typescript/lib/typescript' {
 		interface Response {
 			readonly _serverType?: ServerType;
 		}
-
-		//#region PreparePasteEdits
-		interface PreparePasteEditsRequest extends FileRequest {
-			command: 'preparePasteEdits';
-			arguments: PreparePasteEditsRequestArgs;
-		}
-		interface PreparePasteEditsRequestArgs extends FileRequestArgs {
-			copiedTextSpan: TextSpan[];
-		}
-		interface PreparePasteEditsResponse extends Response {
-			body: boolean;
-		}
-		//#endregion
 	}
 }
diff --git a/extensions/typescript-language-features/src/typescriptService.ts b/extensions/typescript-language-features/src/typescriptService.ts
index 33d89e1df8d..306769f952a 100644
--- a/extensions/typescript-language-features/src/typescriptService.ts
+++ b/extensions/typescript-language-features/src/typescriptService.ts
@@ -77,7 +77,6 @@ interface StandardTsServerRequests {
 	'getMoveToRefactoringFileSuggestions': [Proto.GetMoveToRefactoringFileSuggestionsRequestArgs, Proto.GetMoveToRefactoringFileSuggestions];
 	'linkedEditingRange': [Proto.FileLocationRequestArgs, Proto.LinkedEditingRangeResponse];
 	'mapCode': [Proto.MapCodeRequestArgs, Proto.MapCodeResponse];
-	// @ts-expect-error until ts5.7
 	'copilotRelated': [Proto.FileRequestArgs, Proto.CopilotRelatedResponse];
 	'getPasteEdits': [Proto.GetPasteEditsRequestArgs, Proto.GetPasteEditsResponse];
 	'preparePasteEdits': [Proto.PreparePasteEditsRequestArgs, Proto.PreparePasteEditsResponse];