diff --git a/lib/tfw/networking/server/event_handler_connector.py b/lib/tfw/networking/server/event_handler_connector.py
index 41b6b54..a735673 100644
--- a/lib/tfw/networking/server/event_handler_connector.py
+++ b/lib/tfw/networking/server/event_handler_connector.py
@@ -34,5 +34,5 @@ class EventHandlerConnector(EventHandlerDownlinkConnector, EventHandlerUplinkCon
     def register_callback(self, callback):
         self._zmq_pull_stream.on_recv(callback)
 
-    def send_message(self, message: dict, key: str = None):
+    def send_message(self, message: dict):
         self._zmq_pub_socket.send_multipart(serialize_tfw_msg(message))
diff --git a/lib/tfw/networking/server/zmq_websocket_handler.py b/lib/tfw/networking/server/zmq_websocket_handler.py
index f0b865a..efd7b00 100644
--- a/lib/tfw/networking/server/zmq_websocket_handler.py
+++ b/lib/tfw/networking/server/zmq_websocket_handler.py
@@ -46,7 +46,7 @@ class ZMQWebSocketHandler(WebSocketHandler, ABC):
 
     def mirror(self, message):
         message = message['data']
-        self._event_handler_connector.send_message(message, message['key'])
+        self._event_handler_connector.send_message(message)
 
     def on_message(self, message):
         LOG.debug('Received on WebSocket: %s', message)
@@ -57,7 +57,7 @@ class ZMQWebSocketHandler(WebSocketHandler, ABC):
         raise NotImplementedError
 
     def send_message(self, message: dict, key: str = None):
-        self._event_handler_connector.send_message(message, key)
+        self._event_handler_connector.send_message(message)
 
     @abstractmethod
     def handle_trigger(self, message):