diff --git a/types/ngstorage/index.d.ts b/types/ngstorage/index.d.ts
index 83c740ff0e..ca86f3d1a8 100644
--- a/types/ngstorage/index.d.ts
+++ b/types/ngstorage/index.d.ts
@@ -2,6 +2,7 @@
 // Project: https://github.com/gsklee/ngStorage
 // Definitions by: Jakub Pistek <https://github.com/kubiq>
 // Definitions: https://github.com/kubiq/DefinitelyTyped
+// TypeScript Version: 2.3
 
 export namespace ngStorage {
     interface StorageService {