diff --git a/public/index.html b/public/index.html
index 1ce8900c..5af72a45 100644
--- a/public/index.html
+++ b/public/index.html
@@ -5,11 +5,11 @@
     <title>React Tutorial</title>
     <!-- Not present in the tutorial. Just for basic styling. -->
     <link rel="stylesheet" href="css/base.css" />
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.2.0/react.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.2.0/react-dom.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.6.16/browser.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/remarkable/1.6.2/remarkable.min.js"></script>
+    <script src="https://npmcdn.com/react@15.3.0/dist/react.js"></script>
+    <script src="https://npmcdn.com/react-dom@15.3.0/dist/react-dom.js"></script>
+    <script src="https://npmcdn.com/babel-core@5.8.38/browser.min.js"></script>
+    <script src="https://npmcdn.com/jquery@3.1.0/dist/jquery.min.js"></script>
+    <script src="https://npmcdn.com/remarkable@1.6.2/dist/remarkable.min.js"></script>
   </head>
   <body>
     <div id="content"></div>
