diff --git a/index.html b/index.html
index d0688e718f..bfb77e8af2 100644
--- a/index.html
+++ b/index.html
@@ -934,5 +934,5 @@ <h3>Further Learning</h3>
   <em>Copyright &copy; 2019 A <strong><a rel=external target=devpunks title=devPunks href=//devpunks.com>devPunks</a></strong> project</em>
 </footer>
 
-<script src=/browser-sync.es></script>
+<script src=/browser-sync.js></script>