diff --git a/index.html b/index.html
index 247cf64..835e5c5 100644
--- a/index.html
+++ b/index.html
@@ -55,11 +55,11 @@
   <head>
     <meta charset="utf-8" />
     <title>My Code Editor</title>
-    <script src="https://npmcdn.com/react@15.3.1/dist/react.js"></script>
-    <script src="https://npmcdn.com/react-dom@15.3.1/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>
+    <script src="https://unpkg.com/react@15.3.1/dist/react.js"></script>
+    <script src="https://unpkg.com/react-dom@15.3.1/dist/react-dom.js"></script>
+    <script src="https://unpkg.com/babel-core@5.8.38/browser.min.js"></script>
+    <script src="https://unpkg.com/jquery@3.1.0/dist/jquery.min.js"></script>
+    <script src="https://unpkg.com/remarkable@1.6.2/dist/remarkable.min.js"></script>
   </head>
   <body>
     <div id="app"></div>
