diff --git a/types/ioredis/index.d.ts b/types/ioredis/index.d.ts
index e9fbf44382..ff2810ebd4 100644
--- a/types/ioredis/index.d.ts
+++ b/types/ioredis/index.d.ts
@@ -5,6 +5,7 @@
 //                 Yoga Aliarham <https://github.com/aliarham11>
 //                 Ebrahim <https://github.com/br8h>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
 
 /* =================== USAGE ===================
     import * as Redis from "ioredis";