diff --git a/index.html b/index.html
index 4748eeef..825e8791 100644
--- a/index.html
+++ b/index.html
@@ -8,14 +8,14 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
 
     <!-- Twitter Bootstrap -->
-    <link href="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/css/bootstrap.min.css" rel="stylesheet">
+    <link href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.2/css/bootstrap.min.css" rel="stylesheet">
 
     <!-- Material Design for Bootstrap -->
     <link href="dist/css/material-wfont.min.css" rel="stylesheet">
     <link href="dist/css/ripples.min.css" rel="stylesheet">
 
     <!-- Dropdown.js -->
-    <link href="http://cdn.rawgit.com/FezVrasta/dropdown.js/master/jquery.dropdown.css" rel="stylesheet">
+    <link href="//cdn.rawgit.com/FezVrasta/dropdown.js/master/jquery.dropdown.css" rel="stylesheet">
 
     <!-- Page style -->
     <style>
@@ -122,7 +122,7 @@
 
 
     <!-- jQuery -->
-    <script src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
+    <script src="//code.jquery.com/jquery-1.10.2.min.js"></script>
 
   </head>
   <body>
@@ -1508,7 +1508,7 @@
 
 
     <!-- Sliders -->
-    <script src="http://cdnjs.cloudflare.com/ajax/libs/noUiSlider/6.2.0/jquery.nouislider.min.js"></script>
+    <script src="//cdnjs.cloudflare.com/ajax/libs/noUiSlider/6.2.0/jquery.nouislider.min.js"></script>
     <script>
       $(function() {
         $.material.init();
