diff --git a/index.html b/index.html
index 63055e9..3f864ef 100644
--- a/index.html
+++ b/index.html
@@ -10,11 +10,11 @@
   <link href="css/style.css" type="text/css" rel="stylesheet" media="screen,projection"/>
 
     <!-- Polyfill(s) for older browsers -->
-    <script src="https://npmcdn.com/core-js/client/shim.min.js"></script>
+    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
 
-    <script src="https://npmcdn.com/zone.js@0.6.12?main=browser"></script>
-    <script src="https://npmcdn.com/reflect-metadata@0.1.3"></script>
-    <script src="https://npmcdn.com/systemjs@0.19.27/dist/system.src.js"></script>
+    <script src="https://unpkg.com/zone.js@0.6.12?main=browser"></script>
+    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
+    <script src="https://unpkg.com/systemjs@0.19.27/dist/system.src.js"></script>
 
     <script src="systemjs.config.js"></script>
     <!--  Scripts-->
diff --git a/node_modules/rxjs/README.md b/node_modules/rxjs/README.md
index f93aeb4..a885a7d 100644
--- a/node_modules/rxjs/README.md
+++ b/node_modules/rxjs/README.md
@@ -108,10 +108,10 @@ npm install @reactivex/rxjs@5.0.0-beta.1
 
 ### CDN
 
-For CDN, you can use [npmcdn](https://npmcdn.com). Just replace `version` with the current
+For CDN, you can use [unpkg](https://unpkg.com). Just replace `version` with the current
 version on the link below:
 
-https://npmcdn.com/@reactivex/rxjs@version/dist/global/Rx.umd.js
+https://unpkg.com/@reactivex/rxjs@version/dist/global/Rx.umd.js
 
 #### Node.js Usage: