diff --git a/types/json_ml/index.d.ts b/types/json_ml/index.d.ts
index e2eb2c7af4..7cab812880 100644
--- a/types/json_ml/index.d.ts
+++ b/types/json_ml/index.d.ts
@@ -2,6 +2,7 @@
 // Project: https://github.com/59naga/json-ml
 // Definitions by: Alan Plum <https://github.com/pluma>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 3.0
 
 /// <reference types="cheerio" />