diff --git a/renderer.js b/renderer.js
index 810be44..3b3e096 100644
--- a/renderer.js
+++ b/renderer.js
@@ -6,6 +6,7 @@ window.addEventListener('DOMContentLoaded', async () => {
   const addBtn      = document.getElementById('addFolderBtn');
   const titleEl     = document.getElementById('currentTitle');
   const treeviewEl  = document.getElementById('folderHierarchyDropdown');
+  const titleArrow  = document.getElementById('titleArrow');
   const contentList = document.getElementById('contentList');
   const panel       = document.querySelector('.flex-1.p-4.overflow-y-auto');