diff --git a/lib/tfw/networking/event_handlers/server_connector.py b/lib/tfw/networking/event_handlers/server_connector.py
index 74c2316..fa98f21 100644
--- a/lib/tfw/networking/event_handlers/server_connector.py
+++ b/lib/tfw/networking/event_handlers/server_connector.py
@@ -6,7 +6,7 @@ from functools import partial
 import zmq
 from zmq.eventloop.zmqstream import ZMQStream
 
-from tfw.networking import serialize_all
+from tfw.networking import serialize_tfw_msg
 from tfw.networking import ZMQConnectorBase
 from tfw.config import TFWENV
 
@@ -35,7 +35,7 @@ class ServerUplinkConnector(ZMQConnectorBase):
         self.send(message)
 
     def send(self, message):
-        self._zmq_push_socket.send_multipart(serialize_all(message['key'], message))
+        self._zmq_push_socket.send_multipart(serialize_tfw_msg(message))
 
 
 class ServerConnector(ServerUplinkConnector, ServerDownlinkConnector):