diff --git a/graphene_django/templates/graphene/graphiql.html b/graphene_django/templates/graphene/graphiql.html
index 1ba0613..b04ccd9 100644
--- a/graphene_django/templates/graphene/graphiql.html
+++ b/graphene_django/templates/graphene/graphiql.html
@@ -16,11 +16,11 @@ add "&raw" to the end of the URL within a browser.
       width: 100%;
     }
   </style>
-  <link href="//cdn.jsdelivr.net/npm/graphiql@{{graphiql_version}}/graphiql.css" rel="stylesheet" />
-  <script src="//cdn.jsdelivr.net/npm/whatwg-fetch@2.0.3/fetch.min.js"></script>
-  <script src="//cdn.jsdelivr.net/npm/react@16.2.0/umd/react.production.min.js"></script>
-  <script src="//cdn.jsdelivr.net/npm/react-dom@16.2.0/umd/react-dom.production.min.js"></script>
-  <script src="//cdn.jsdelivr.net/npm/graphiql@{{graphiql_version}}/graphiql.min.js"></script>
+  <link href="https://cdn.jsdelivr.net/npm/graphiql@{{graphiql_version}}/graphiql.css" rel="stylesheet" />
+  <script src="https://cdn.jsdelivr.net/npm/whatwg-fetch@2.0.3/fetch.min.js"></script>
+  <script src="https://cdn.jsdelivr.net/npm/react@16.2.0/umd/react.production.min.js"></script>
+  <script src="https://cdn.jsdelivr.net/npm/react-dom@16.2.0/umd/react-dom.production.min.js"></script>
+  <script src="https://cdn.jsdelivr.net/npm/graphiql@{{graphiql_version}}/graphiql.min.js"></script>
 </head>
 <body>
   <script>
