diff --git a/src/python/jw/pkg/lib/App.py b/src/python/jw/pkg/lib/App.py
index 6cb95777..0e5f888d 100644
--- a/src/python/jw/pkg/lib/App.py
+++ b/src/python/jw/pkg/lib/App.py
@@ -100,6 +100,12 @@ class App: # export
                 self.__eloop = None
             self.__own_eloop = False
 
+    async def __aenter__(self) ->None:
+        return self
+
+    async def __aexit__(self, exc_type, exc, tb) -> None:
+        pass
+
     async def __run(self, argv=None) -> None:
 
         try:
@@ -188,5 +194,5 @@ class App: # export
         return ret
 
 def run_sub_commands(description = '', name_filter = '^Cmd.*', modules=None, argv=None): # export
-    app = App(description, name_filter, modules)
-    return app.run(argv=argv)
+    with App(description, name_filter, modules) as app:
+        return app.run(argv=argv)