diff --git a/index.html b/index.html
index 9b759b7..01e941f 100755
--- a/index.html
+++ b/index.html
@@ -16,7 +16,7 @@
     crossorigin="anonymous">
     <link 
     rel="stylesheet" 
-    href="http://cdn.leafletjs.com/leaflet-0.7/leaflet.css"
+    href="https://cdn.jsdelivr.net/npm/leaflet@0.7.7/dist/leaflet.css"
     />
   <!-- Custom styles for this template -->
   <link href="style/justified-nav.css" rel="stylesheet">
@@ -231,11 +231,11 @@ <h1>How to Use it ?</h1>
     crossorigin="anonymous"></script>
   <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1"
     crossorigin="anonymous"></script>
-    <script src="http://d3js.org/d3.v3.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/d3@3.3.0/d3.min.js"></script>
     
   
   <script
-  src="http://cdn.leafletjs.com/leaflet-0.7/leaflet.js">
+  src="https://cdn.jsdelivr.net/npm/leaflet@0.7.7/dist/leaflet.js">
 </script>
 
   <script src="js/main.js"></script>