diff --git a/ng2_ejems/ejem1_no_tools/index.html b/ng2_ejems/ejem1_no_tools/index.html
index 954fac3..385cd14 100644
--- a/ng2_ejems/ejem1_no_tools/index.html
+++ b/ng2_ejems/ejem1_no_tools/index.html
@@ -9,11 +9,11 @@
     <!-- IE required polyfills, in this exact order -->
     <script src="https://cdnjs.cloudflare.com/ajax/libs/es6-shim/0.33.3/es6-shim.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.20/system-polyfills.js"></script>
-    <script src="https://npmcdn.com/angular2@2.0.0-beta.9/es6/dev/src/testing/shims_for_IE.js"></script>
+    <script src="https://unpkg.com/angular2@2.0.0-beta.9/es6/dev/src/testing/shims_for_IE.js"></script>
 
     <script src="https://code.angularjs.org/2.0.0-beta.9/angular2-polyfills.js"></script>
     <script src="https://code.angularjs.org/tools/system.js"></script>
-    <script src="https://npmcdn.com/typescript@1.8.2/lib/typescript.js"></script>
+    <script src="https://unpkg.com/typescript@1.8.2/lib/typescript.js"></script>
     <script src="https://code.angularjs.org/2.0.0-beta.9/Rx.js"></script>
     <script src="https://code.angularjs.org/2.0.0-beta.9/angular2.dev.js"></script>
     <script src="https://code.angularjs.org/2.0.0-beta.9/http.dev.js"></script>