diff --git a/src/memory_manager/tui/app.py b/src/memory_manager/tui/app.py
index 2252c44..67ab388 100644
--- a/src/memory_manager/tui/app.py
+++ b/src/memory_manager/tui/app.py
@@ -1,3 +1,4 @@
+import os
 from datetime import datetime
 from typing import Any