diff --git a/src/services/shims.ts b/src/services/shims.ts
index ff57dd9cf7ab4..9a581ed6be18d 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -1203,6 +1203,6 @@ namespace TypeScript.Services {
 // TODO: it should be moved into a namespace though.
 
 /* @internal */
-const toolsVersion = "1.9";
+const toolsVersion = "2.1";
 
 /* tslint:enable:no-unused-variable */