diff --git a/src/index.html b/src/index.html
index 30b31ba09..7112b91d3 100644
--- a/src/index.html
+++ b/src/index.html
@@ -874,7 +874,7 @@ <h2>JavaScript Projects</h2>
     </script>
   </div>
 
-  <script src="google-code-prettify/prettify.min.js"></script>
+  <script src="google-code-prettify/prettify.min.js" async></script>
   <script src="js/homepage.js"></script>
   <script src="js/download-data.js"></script>
   <script src="js/angular-ui-bootstrap.js"></script>
@@ -892,8 +892,8 @@ <h2>JavaScript Projects</h2>
     angular.bootstrap(document, ['ngRoute', 'homepage', 'ngLocal.us']);
   </script>
 
-  <script src="https://apis.google.com/js/plusone.js"></script>
-  <script src="//platform.twitter.com/widgets.js"></script>
+  <script src="https://apis.google.com/js/plusone.js" async></script>
+  <script src="//platform.twitter.com/widgets.js" async></script>
   <script type="text/javascript">
     var _gaq=[
       ['_setAccount','UA-8594346-3'],