diff --git a/types/styled-system/index.d.ts b/types/styled-system/index.d.ts
index 1ca193f899..8d19fe6463 100644
--- a/types/styled-system/index.d.ts
+++ b/types/styled-system/index.d.ts
@@ -7,7 +7,7 @@
 //                 Eloy Durán      <https://github.com/alloy>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-// TypeScript Version: 2.2
+// TypeScript Version: 2.6
 
 /**
  * Core