diff --git a/supabase_auth/timer.py b/supabase_auth/timer.py
index 60095c20..11f11536 100644
--- a/supabase_auth/timer.py
+++ b/supabase_auth/timer.py
@@ -28,6 +28,7 @@ def cleanup(_):
             self._task.add_done_callback(cleanup)
         else:
             self._timer = _Timer(self._milliseconds / 1000, self._function)
+            self._timer.daemon = True
             self._timer.start()
 
     def cancel(self) -> None: