diff --git a/types/royalslider/index.d.ts b/types/royalslider/index.d.ts
index 9595f2d494..2eaf6bfe7f 100644
--- a/types/royalslider/index.d.ts
+++ b/types/royalslider/index.d.ts
@@ -2,6 +2,7 @@
 // Project: http://dimsemenov.com/plugins/royal-slider/documentation/
 // Definitions by: Christiaan Rakowski <https://github.com/csrakowski/>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
 
 /// <reference types="jquery" />