diff --git a/_layouts/gallery-slideshow.html b/_layouts/gallery-slideshow.html
index 414b778..c22c9a6 100644
--- a/_layouts/gallery-slideshow.html
+++ b/_layouts/gallery-slideshow.html
@@ -3,7 +3,7 @@
   <head>
     <title>{{ page.title }}</title>
     
-    <script src="http://ajax.googleapis.com/ajax/libs/mootools/1.5.1/mootools-yui-compressed.js"></script>
+    <script src="https://ajax.googleapis.com/ajax/libs/mootools/1.5.1/mootools-yui-compressed.js"></script>
 
     <!-- Core CSS file -->
     <link rel="stylesheet" href="{{ site.static_prefix }}/photo-swipe/photoswipe.css"> 
