diff --git a/lib/main.html b/lib/main.html
index 830d3b48..f6b8b21c 100644
--- a/lib/main.html
+++ b/lib/main.html
@@ -85,6 +85,7 @@
   <script src="../extra_scripts/boost/boostNewLineIndentContinueMarkdownList.js"></script>
 
   <script src="../node_modules/codemirror/addon/edit/closebrackets.js"></script>
+  <script src="../node_modules/codemirror/addon/edit/matchbrackets.js"></script>
 
   <script src="../node_modules/codemirror/addon/search/search.js"></script>
   <script src="../node_modules/codemirror/addon/search/searchcursor.js"></script>