diff --git a/catser/app.py b/catser/app.py
index 41c66db..a8b91de 100644
--- a/catser/app.py
+++ b/catser/app.py
@@ -201,6 +201,8 @@ class CatserApp:
     def shutdown(self) -> None:
         """Destroys overlay window and releases resources."""
         self.is_running = False
+        if self.aw_client:
+            self.aw_client.stop()
         if self.overlay:
             self.overlay.destroy()
             self.overlay = None