diff --git a/default.hbs b/default.hbs
index 4a4c0c1..7a50ce0 100644
--- a/default.hbs
+++ b/default.hbs
@@ -29,7 +29,7 @@
     {{{body}}}
   </div>	
 
-  <script src="{{asset "built/yuika.js"}}"></script>
+  <script async defer src="{{asset "built/yuika.js"}}"></script>
   {{{block "scripts"}}}
 
   {{ghost_foot}}