diff --git a/index.html b/index.html
index ff5ac6b..fab8294 100644
--- a/index.html
+++ b/index.html
@@ -13,11 +13,11 @@
   <!-- IE required polyfills, in this exact order -->
   <script src="https://cdnjs.cloudflare.com/ajax/libs/es6-shim/0.35.0/es6-shim.min.js"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.26/system-polyfills.js"></script>
-  <script src="https://npmcdn.com/angular2@2.0.0-beta.17/es6/dev/src/testing/shims_for_IE.js"></script>
+  <script src="https://unpkg.com/angular2@2.0.0-beta.17/es6/dev/src/testing/shims_for_IE.js"></script>
 
   <script src="https://code.angularjs.org/2.0.0-beta.17/angular2-polyfills.js"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.26/system.js"></script>
-  <script src="https://npmcdn.com/typescript@1.8.10/lib/typescript.js"></script>
+  <script src="https://unpkg.com/typescript@1.8.10/lib/typescript.js"></script>
   <script src="https://code.angularjs.org/2.0.0-beta.17/Rx.js"></script>
   <script src="https://code.angularjs.org/2.0.0-beta.17/angular2.dev.js"></script>