diff --git a/index.html b/index.html
index 7797a76..0797467 100644
--- a/index.html
+++ b/index.html
@@ -19,11 +19,11 @@
     <script src="node_modules/reflect-metadata/Reflect.js"></script>
     <script src="node_modules/systemjs/dist/system.src.js"></script>-->
     
-    <script src="https://npmcdn.com/core-js@2.4.0/client/shim.min.js"></script>
+    <script src="https://unpkg.com/core-js@2.4.0/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>
 
     <!-- 2. Configure SystemJS -->
     <script src="dojoConfigBrowser.js"></script>
@@ -32,7 +32,7 @@
     <script src="node_modules/esri-system-js/dist/esriSystem.js"></script>-->
     
     <script src="//js.arcgis.com/4.0/"></script>
-    <script src="//npmcdn.com/esri-system-js@1.0.0-beta.0/dist/esriSystem.js"></script>
+    <script src="//unpkg.com/esri-system-js@1.0.0-beta.0/dist/esriSystem.js"></script>
     
     <!--<script src="systemjs.config.js"></script>-->
     <script src="systemjs.config.cdn.js"></script>
diff --git a/systemjs.config.cdn.js b/systemjs.config.cdn.js
index edb9c7f..827a521 100644
--- a/systemjs.config.cdn.js
+++ b/systemjs.config.cdn.js
@@ -10,9 +10,9 @@
   var map = {
     'app':                        'app', // 'dist',
 
-    '@angular':                   'https://npmcdn.com/@angular', // sufficient if we didn't pin the version
-    'angular2-in-memory-web-api': 'https://npmcdn.com/angular2-in-memory-web-api', // get latest
-    'rxjs':                       'https://npmcdn.com/rxjs@5.0.0-beta.6',
+    '@angular':                   'https://unpkg.com/@angular', // sufficient if we didn't pin the version
+    'angular2-in-memory-web-api': 'https://unpkg.com/angular2-in-memory-web-api', // get latest
+    'rxjs':                       'https://unpkg.com/rxjs@5.0.0-beta.6',
     'esri':                       'http://js.arcgis.com/4.0/esri'
   };
 
@@ -38,7 +38,7 @@
   // Add map entries for each angular package
   // only because we're pinning the version with `ngVer`.
   ngPackageNames.forEach(function(pkgName) {
-    map['@angular/'+pkgName] = 'https://npmcdn.com/@angular/' + pkgName + ngVer;
+    map['@angular/'+pkgName] = 'https://unpkg.com/@angular/' + pkgName + ngVer;
   });
 
   // Bundled (~40 requests):