diff --git a/build/package.json b/build/package.json
index eb85be5acaf..01e5f125838 100644
--- a/build/package.json
+++ b/build/package.json
@@ -70,5 +70,7 @@
     "watch": "../node_modules/.bin/tsc -p tsconfig.build.json --watch",
     "npmCheckJs": "../node_modules/.bin/tsc --noEmit"
   },
-  "dependencies": {}
+  "dependencies": {
+    "typescript": "^4.7.0-dev.20220315"
+  }
 }
diff --git a/build/yarn.lock b/build/yarn.lock
index 925ed369f62..1966f898319 100644
--- a/build/yarn.lock
+++ b/build/yarn.lock
@@ -2841,6 +2841,11 @@ typed-rest-client@^1.8.4:
     tunnel "0.0.6"
     underscore "^1.12.1"
 
+typescript@^4.7.0-dev.20220315:
+  version "4.7.0-dev.20220315"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.7.0-dev.20220315.tgz#f4486025a7d9aa39e8bd21d1f863e7b7513347dd"
+  integrity sha512-miUXjP+dc+ZRT7cUv/p+FKBBRifvV/dLZsrYigY3pclH/LMWWcmUz9mEtqOxTs8m3d1T6RobtF6BfQB8goqM6w==
+
 uc.micro@^1.0.1, uc.micro@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/uc.micro/-/uc.micro-1.0.5.tgz#0c65f15f815aa08b560a61ce8b4db7ffc3f45376"
diff --git a/package.json b/package.json
index d40f29448a8..d8e9eafd27c 100644
--- a/package.json
+++ b/package.json
@@ -201,7 +201,7 @@
     "style-loader": "^1.0.0",
     "ts-loader": "^9.2.7",
     "tsec": "0.1.4",
-    "typescript": "^4.7.0-dev.20220303",
+    "typescript": "^4.7.0-dev.20220315",
     "typescript-formatter": "7.1.0",
     "underscore": "^1.12.1",
     "util": "^0.12.4",
diff --git a/src/vs/platform/externalTerminal/electron-main/externalTerminalService.test.ts b/src/vs/platform/externalTerminal/electron-main/externalTerminalService.test.ts
index 41a96448f98..f5f7003b36e 100644
--- a/src/vs/platform/externalTerminal/electron-main/externalTerminalService.test.ts
+++ b/src/vs/platform/externalTerminal/electron-main/externalTerminalService.test.ts
@@ -7,7 +7,7 @@ import { deepStrictEqual, strictEqual } from 'assert';
 import { DEFAULT_TERMINAL_OSX, IExternalTerminalConfiguration } from 'vs/platform/externalTerminal/common/externalTerminal';
 import { LinuxExternalTerminalService, MacExternalTerminalService, WindowsExternalTerminalService } from 'vs/platform/externalTerminal/node/externalTerminalService';
 
-const mockConfig: IExternalTerminalConfiguration = Object.freeze({
+const mockConfig = Object.freeze<IExternalTerminalConfiguration>({
 	terminal: {
 		explorerKind: 'external',
 		external: {
diff --git a/src/vs/workbench/api/common/extHostEditorTabs.ts b/src/vs/workbench/api/common/extHostEditorTabs.ts
index 9fb18d8b86e..6bbd670dc32 100644
--- a/src/vs/workbench/api/common/extHostEditorTabs.ts
+++ b/src/vs/workbench/api/common/extHostEditorTabs.ts
@@ -109,7 +109,7 @@ export class ExtHostEditorTabs implements IExtHostEditorTabs {
 	}
 
 	private createExtHostTabObject(tabDto: IEditorTabDto): IEditorTab {
-		return Object.freeze({
+		return Object.freeze<IEditorTab>({
 			label: tabDto.label,
 			viewColumn: typeConverters.ViewColumn.to(tabDto.viewColumn),
 			resource: URI.revive(tabDto.resource),
diff --git a/yarn.lock b/yarn.lock
index 4e4a101bbfd..95614233d5e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11517,10 +11517,10 @@ typescript@^2.6.2:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.6.2.tgz#3c5b6fd7f6de0914269027f03c0946758f7673a4"
   integrity sha1-PFtv1/beCRQmkCfwPAlGdY92c6Q=
 
-typescript@^4.7.0-dev.20220303:
-  version "4.7.0-dev.20220303"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.7.0-dev.20220303.tgz#845889467c51fa27e746100190f750444cfd22ca"
-  integrity sha512-Lhmh5V02dsae865qHgdZyygJQp7MuErTHJF63NB/by1vXBtuLEUnHoPWbZOGa5lemklMP+VGSjVH6jJyGjabLQ==
+typescript@^4.7.0-dev.20220315:
+  version "4.7.0-dev.20220315"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.7.0-dev.20220315.tgz#f4486025a7d9aa39e8bd21d1f863e7b7513347dd"
+  integrity sha512-miUXjP+dc+ZRT7cUv/p+FKBBRifvV/dLZsrYigY3pclH/LMWWcmUz9mEtqOxTs8m3d1T6RobtF6BfQB8goqM6w==
 
 typical@^4.0.0:
   version "4.0.0"