diff --git a/templates/themes/catalog/catalog.html b/templates/themes/catalog/catalog.html
index aef6c139..acf538f0 100644
--- a/templates/themes/catalog/catalog.html
+++ b/templates/themes/catalog/catalog.html
@@ -48,7 +48,7 @@
                                 <div class="thread grid-li grid-size-small">  
                                         <a href="{{post.link}}">  
 						{% if post.youtube %}
-							<img src="http://img.youtube.com/vi/{{ post.youtube }}/0.jpg" 
+							<img src="//img.youtube.com/vi/{{ post.youtube }}/0.jpg" 
 						{% else %}
 							<img src="{{post.file}}" 
 						{% endif %}