diff --git a/index.html b/index.html
index efc3449f..12a3a6eb 100644
--- a/index.html
+++ b/index.html
@@ -9,7 +9,7 @@
     <script src="config.js"></script>
     <script src="https://code.angularjs.org/2.0.0-alpha.53/angular2.js"></script>
     <script src="https://code.angularjs.org/2.0.0-alpha.53/router.dev.js"></script>
-    <script src="https://npmcdn.com/@reactivex/rxjs@5.0.0-alpha.14/dist/global/Rx.js"></script>
+    <script src="https://unpkg.com/@reactivex/rxjs@5.0.0-alpha.14/dist/global/Rx.js"></script>
     <script>
         System.import('./bootstrap.ts').then(null, console.error.bind(console));
     </script>