diff --git a/gns3server/compute/notification_manager.py b/gns3server/compute/notification_manager.py
index 22955b177..44c9ca391 100644
--- a/gns3server/compute/notification_manager.py
+++ b/gns3server/compute/notification_manager.py
@@ -54,7 +54,7 @@ def emit(self, action, event, **kwargs):
         """
 
         for listener in self._listeners:
-            asyncio.get_event_loop().call_soon(listener.put_nowait, (action, event, kwargs))
+            asyncio.get_event_loop().call_soon_threadsafe(listener.put_nowait, (action, event, kwargs))
 
     @staticmethod
     def reset():