diff --git a/templates/layouts/main.html.ep b/templates/layouts/main.html.ep
index a729e42..3dbdea1 100644
--- a/templates/layouts/main.html.ep
+++ b/templates/layouts/main.html.ep
@@ -6,6 +6,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=false, user-scalable=no" />
     <link href="<%= stash 'prefix' %>/img/favicon.ico" rel="shortcut icon" type="image/x-icon" /> 
     <link href="<%= stash 'prefix' %>/css/kalamar-<%= $Kalamar::VERSION %>.css" type="text/css" rel="stylesheet" />
+    <script src="<%= (stash('prefix') // '') . '/js/' . loc('jsFile', 'kalamar-' . $Kalamar::VERSION . '-en.js') %>" async="async"></script>
   </head>
 % my $embedded = 0;
 % $embedded = 1 if stash('embedded');
@@ -33,8 +34,6 @@
       <%= doc_link_to 'V '. $Kalamar::VERSION, 'korap', 'kalamar' %>
     </footer>
     % };
-
-<script src="<%= (stash('prefix') // '') . '/js/' . loc('jsFile', 'kalamar-' . $Kalamar::VERSION . '-en.js') %>"></script>
 %= javascript begin  
   window.KorAP = window.KorAP || {};
   % my $api = url_for('index');