diff --git a/templates/post.html b/templates/post.html
index da3ed8a..00c5c67 100644
--- a/templates/post.html
+++ b/templates/post.html
@@ -33,7 +33,7 @@
     {{> footer }}
   </div>
 
-  <link rel="stylesheet" href="/css/zenburn.css">
+  <link rel="stylesheet" href="/css/zenburn.css" async defer>
   <script type="text/javascript" src="/js/highlight.pack.js"></script>
   <script>hljs.initHighlightingOnLoad();</script>
   <script id="twitter-wjs" src="https://platform.twitter.com/widgets.js"></script>