diff --git a/theme/index.hbs b/theme/index.hbs
index f66bee8..aabdf1d 100644
--- a/theme/index.hbs
+++ b/theme/index.hbs
@@ -297,9 +297,10 @@
       {{/if}}
 
       <script src="{{ path_to_root }}clipboard.min.js"></script>
-      <script async src="{{ path_to_root }}highlight.js"></script>
-      <script async src="{{ path_to_root }}theme/groovy.min.js"></script>
+      <script src="{{ path_to_root }}highlight.js"></script>
       <script src="{{ path_to_root }}book.js"></script>
+      <script src="{{ path_to_root }}theme/groovy.min.js"></script>
+      <script>hljs.initHighlightingOnLoad();</script>
 
       <!-- Custom JS scripts -->
       {{#each additional_js}}
@@ -335,5 +336,4 @@
 
   gtag('config', 'G-6NHZBVG5F6');
 </script>
-<script>hljs.initHighlightingOnLoad();</script>
 </html>