diff --git a/types/auth0-js/index.d.ts b/types/auth0-js/index.d.ts
index 3416c74295..6f52a90333 100644
--- a/types/auth0-js/index.d.ts
+++ b/types/auth0-js/index.d.ts
@@ -4,6 +4,7 @@
 //                 Matt Durrant <https://github.com/mdurrant>
 //                 Peter Blazejewicz <https://github.com/peterblazejewicz>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
 
 export as namespace auth0;