diff --git a/bec_widgets/utils/bec_widget.py b/bec_widgets/utils/bec_widget.py
index 01658960..e5b57a0f 100644
--- a/bec_widgets/utils/bec_widget.py
+++ b/bec_widgets/utils/bec_widget.py
@@ -1,2 +1,7 @@
 class BECWidget:
     """Base class for all BEC widgets."""
+
+    def closeEvent(self, event):
+        if hasattr(self, "cleanup"):
+            self.cleanup()
+        event.accept()