diff --git a/templates/include/post-render.tmpl b/templates/include/post-render.tmpl
index 8e694a0..7079ccd 100644
--- a/templates/include/post-render.tmpl
+++ b/templates/include/post-render.tmpl
@@ -44,8 +44,9 @@
       // Check what we need to load
       for (i=0; i < lb.length; i++) {
         lang = lb[i].className.replace('language-','');
-	if (!langs.includes(lang)) {
-	  jss.push(hlbaseUri + "languages/" + lang + ".min.js");
+	lurl = hlbaseUri + "languages/" + lang + ".min.js";
+	if (!(langs.includes(lang) || jss.includes(lurl))) {
+	  jss.push(lurl);
 	}
       }
       // Load files in order, higlight on last load