diff --git a/types/hummus-recipe/index.d.ts b/types/hummus-recipe/index.d.ts
index 2a02db53ac..be2c68b6b5 100644
--- a/types/hummus-recipe/index.d.ts
+++ b/types/hummus-recipe/index.d.ts
@@ -2,6 +2,7 @@
 // Project: https://github.com/chunyenHuang/hummusRecipe
 // Definitions by: Erik Berreßem <https://github.com/erikberressem>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.1
 
 declare namespace HummusRecipe {
     interface RecipeOptions {