diff --git a/types/ember/index.d.ts b/types/ember/index.d.ts
index 6119f625d4..390bad601a 100755
--- a/types/ember/index.d.ts
+++ b/types/ember/index.d.ts
@@ -13,6 +13,9 @@
 // TypeScript Version: 2.8
 
 /// <reference types="jquery" />
+/// <reference types="handlebars" />
+/// <reference types="ember__string" />
+/// <reference types="ember__polyfills" />
 
 declare module 'ember' {
     import {