diff --git a/extensions/npm-shrinkwrap.json b/extensions/npm-shrinkwrap.json
index 149c711b4e7355ae26c427e7911f79bf2fc3abd0..97728cb22d91930009ef84d7fab74b85ec7c0900 100644
--- a/extensions/npm-shrinkwrap.json
+++ b/extensions/npm-shrinkwrap.json
@@ -3,9 +3,9 @@
   "version": "0.0.1",
   "dependencies": {
     "typescript": {
-      "version": "2.5.1-insiders.20170818",
-      "from": "typescript@2.5.1-insiders.20170818",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-2.5.1-insiders.20170818.tgz"
+      "version": "2.5.1-insiders.20170825",
+      "from": "typescript@2.5.1-insiders.20170825",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-2.5.1-insiders.20170825.tgz"
     }
   }
 }
diff --git a/extensions/package.json b/extensions/package.json
index 102d1ef27d5cafebefe5e5ed836c8fab2ce0d95f..413a5bbc266806aaa35c61368c8497c0e2fc7753 100644
--- a/extensions/package.json
+++ b/extensions/package.json
@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "description": "Dependencies shared by all extensions",
   "dependencies": {
-    "typescript": "2.5.1-insiders.20170818"
+    "typescript": "2.5.1-insiders.20170825"
   },
   "scripts": {
     "postinstall": "node ./postinstall"
diff --git a/extensions/typescript/src/typescriptServiceClient.ts b/extensions/typescript/src/typescriptServiceClient.ts
index 444df6b2276d647caebf28145b3ae42adbfb1cd9..09cb2140286c68adeddd0b9727418393c15d09b4 100644
--- a/extensions/typescript/src/typescriptServiceClient.ts
+++ b/extensions/typescript/src/typescriptServiceClient.ts
@@ -506,12 +506,12 @@ export default class TypeScriptServiceClient implements ITypescriptServiceClient
 		}
 
 		const compilerOptions: Proto.ExternalProjectCompilerOptions = {
-			module: Proto.ModuleKind.CommonJS,
-			target: Proto.ScriptTarget.ES6,
+			module: 'CommonJS' as Proto.ModuleKind,
+			target: 'ES6' as Proto.ScriptTarget,
 			allowSyntheticDefaultImports: true,
 			allowNonTsExtensions: true,
 			allowJs: true,
-			jsx: Proto.JsxEmit.Preserve
+			jsx: 'Preserve' as Proto.JsxEmit
 		};
 
 		if (this.apiVersion.has230Features()) {