diff --git a/gns3server/api/routes/compute/notifications.py b/gns3server/api/routes/compute/notifications.py
index 7bc0eb5e..621107a7 100644
--- a/gns3server/api/routes/compute/notifications.py
+++ b/gns3server/api/routes/compute/notifications.py
@@ -78,8 +78,10 @@ async def notification_ws(websocket: WebSocket) -> None:
     except WebSocketException as e:
         log.warning(f"Error while sending to controller event to WebSocket client: {e}")
     finally:
-        await websocket.close()
-
+        try:
+            await websocket.close()
+        except OSError:
+            pass  # ignore OSError: [Errno 107] Transport endpoint is not connected
 
 if __name__ == "__main__":
 
diff --git a/gns3server/api/routes/controller/notifications.py b/gns3server/api/routes/controller/notifications.py
index 624a2f80..2618efae 100644
--- a/gns3server/api/routes/controller/notifications.py
+++ b/gns3server/api/routes/controller/notifications.py
@@ -72,4 +72,7 @@ async def controller_ws_notifications(
     except WebSocketException as e:
         log.warning(f"Error while sending to controller event to WebSocket client: {e}")
     finally:
-        await websocket.close()
+        try:
+            await websocket.close()
+        except OSError:
+            pass  # ignore OSError: [Errno 107] Transport endpoint is not connected
diff --git a/gns3server/api/routes/controller/projects.py b/gns3server/api/routes/controller/projects.py
index 4050b24b..3f855223 100644
--- a/gns3server/api/routes/controller/projects.py
+++ b/gns3server/api/routes/controller/projects.py
@@ -271,7 +271,10 @@ async def project_ws_notifications(
     except WebSocketException as e:
         log.warning(f"Error while sending to project event to WebSocket client: {e}")
     finally:
-        await websocket.close()
+        try:
+            await websocket.close()
+        except OSError:
+            pass  # ignore OSError: [Errno 107] Transport endpoint is not connected
         if project.auto_close:
             # To avoid trouble with client connecting disconnecting we sleep few seconds before checking
             # if someone else is not connected