diff --git a/app/src/messages.py b/app/src/messages.py
index dbe24b5..6553f36 100644
--- a/app/src/messages.py
+++ b/app/src/messages.py
@@ -97,7 +97,7 @@ class Message(metaclass=IterRegistry):
     '''
     def close(self) -> None:
         if self.mb:
-            del self.mb
+            self.mb.close()
             self.mb = None
         pass  # pragma: no cover