diff --git a/static/src/js/mermaid.js b/static/src/js/mermaid.js
index 7519d2a..d944bc8 100644
--- a/static/src/js/mermaid.js
+++ b/static/src/js/mermaid.js
@@ -1,4 +1,4 @@
-let mermaid = require('mermaid');
+const mermaid = require('mermaid');
 
 $(document).ready(function() {
   mermaid.initialize({