diff --git a/sphinx_rtd_theme/layout.html b/sphinx_rtd_theme/layout.html
index 4375286e..16df0fa3 100644
--- a/sphinx_rtd_theme/layout.html
+++ b/sphinx_rtd_theme/layout.html
@@ -85,7 +85,7 @@
   {%- endblock %}
   {%- block extrahead %} {% endblock %}
 
-  <script src="http://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
 
 </head>