--- a/rdf-concepts/index.html	Tue Sep 10 20:41:05 2013 -0400
+++ b/rdf-concepts/index.html	Wed Sep 11 08:27:43 2013 -0400
@@ -54,7 +54,7 @@
 
           // if you want to have extra CSS, append them to this list
           // it is recommended that the respec.css stylesheet be kept
-          extraCSS:             ["https://dvcs.w3.org/hg/rdf/raw-file/default/ReSpec.js/css/respec.css"],
+          extraCSS:             ["//dvcs.w3.org/hg/rdf/raw-file/default/ReSpec.js/css/respec.css"],
 
           // editors, add as many as you like
           // only "name" is required