diff --git a/_layouts/default.html b/_layouts/default.html
index 895536e..4999bc6 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -6,13 +6,13 @@
     {% include meta.html %}
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <link rel="stylesheet" type="text/css" href="https://npmcdn.com/nflow-vis/dist/nflow-vis.css" media="screen">
+    <link rel="stylesheet" type="text/css" href="https://unpkg.com/nflow-vis/dist/nflow-vis.css" media="screen">
     <link rel="stylesheet" type="text/css" href="{{ site.baseurl }}/vendor/font-awesome/css/font-awesome.css" media="screen">
     <link rel="stylesheet" type="text/css" href="{{ site.baseurl }}/style.css" media="screen">
     <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700' rel='stylesheet' type='text/css'>
     <script src="{{ site.baseurl }}/vendor/d3.js"></script>
-    <script src="https://npmcdn.com/nflow"></script>
-    <script src="https://npmcdn.com/nflow-vis"></script>
+    <script src="https://unpkg.com/nflow"></script>
+    <script src="https://unpkg.com/nflow-vis"></script>
     <script src="{{ site.baseurl }}/pages/main.js"></script>
   </head>
   <body