diff --git a/lib/tfw/networking/event_handler_connector.py b/lib/tfw/networking/event_handler_connector.py
index 67ca7ba..03f2513 100644
--- a/lib/tfw/networking/event_handler_connector.py
+++ b/lib/tfw/networking/event_handler_connector.py
@@ -8,15 +8,13 @@ from tfw.config import TFWENV
 from tfw.config.logs import logging
 
 from .serialization import serialize_tfw_msg, with_deserialize_tfw_msg
-from .zmq_connector_base import ZMQConnectorBase
 
 LOG = logging.getLogger(__name__)
 
 
-class EventHandlerDownlinkConnector(ZMQConnectorBase):
-    def __init__(self, zmq_context=None):
-        super(EventHandlerDownlinkConnector, self).__init__(zmq_context)
-        self._zmq_pull_socket = self._zmq_context.socket(zmq.PULL)
+class EventHandlerDownlinkConnector():
+    def __init__(self):
+        self._zmq_pull_socket = zmq.Context.instance().socket(zmq.PULL)
         self._zmq_pull_socket.setsockopt(zmq.RCVHWM, 0)
         self._zmq_pull_stream = ZMQStream(self._zmq_pull_socket)
         address = f'tcp://*:{TFWENV.RECEIVER_PORT}'
@@ -31,10 +29,9 @@ class EventHandlerDownlinkConnector(ZMQConnectorBase):
         self._zmq_pull_stream.close()
 
 
-class EventHandlerUplinkConnector(ZMQConnectorBase):
-    def __init__(self, zmq_context=None):
-        super(EventHandlerUplinkConnector, self).__init__(zmq_context)
-        self._zmq_pub_socket = self._zmq_context.socket(zmq.PUB)
+class EventHandlerUplinkConnector():
+    def __init__(self):
+        self._zmq_pub_socket = zmq.Context.instance().socket(zmq.PUB)
         self._zmq_pub_socket.setsockopt(zmq.SNDHWM, 0)
         address = f'tcp://*:{TFWENV.PUBLISHER_PORT}'
         self._zmq_pub_socket.bind(address)
@@ -48,6 +45,10 @@ class EventHandlerUplinkConnector(ZMQConnectorBase):
 
 
 class EventHandlerConnector(EventHandlerDownlinkConnector, EventHandlerUplinkConnector):
+    def __init__(self):
+        EventHandlerDownlinkConnector.__init__(self)
+        EventHandlerUplinkConnector.__init__(self)
+
     def close(self):
         EventHandlerDownlinkConnector.close(self)
         EventHandlerUplinkConnector.close(self)
diff --git a/lib/tfw/networking/server_connector.py b/lib/tfw/networking/server_connector.py
index c0e2bf1..da84289 100644
--- a/lib/tfw/networking/server_connector.py
+++ b/lib/tfw/networking/server_connector.py
@@ -11,15 +11,13 @@ from tfw.config.logs import logging
 
 from .scope import Scope
 from .serialization import serialize_tfw_msg, with_deserialize_tfw_msg
-from .zmq_connector_base import ZMQConnectorBase
 
 LOG = logging.getLogger(__name__)
 
 
-class ServerDownlinkConnector(ZMQConnectorBase):
-    def __init__(self, zmq_context=None):
-        super(ServerDownlinkConnector, self).__init__(zmq_context)
-        self._zmq_sub_socket = self._zmq_context.socket(zmq.SUB)
+class ServerDownlinkConnector():
+    def __init__(self):
+        self._zmq_sub_socket = zmq.Context.instance().socket(zmq.SUB)
         self._zmq_sub_socket.connect(f'tcp://localhost:{TFWENV.PUBLISHER_PORT}')
         self._zmq_sub_socket.setsockopt(zmq.RCVHWM, 0)
         self._zmq_sub_stream = ZMQStream(self._zmq_sub_socket)
@@ -35,10 +33,9 @@ class ServerDownlinkConnector(ZMQConnectorBase):
         self._zmq_sub_stream.close()
 
 
-class ServerUplinkConnector(ZMQConnectorBase):
-    def __init__(self, zmq_context=None):
-        super(ServerUplinkConnector, self).__init__(zmq_context)
-        self._zmq_push_socket = self._zmq_context.socket(zmq.PUSH)
+class ServerUplinkConnector():
+    def __init__(self):
+        self._zmq_push_socket = zmq.Context.instance().socket(zmq.PUSH)
         self._zmq_push_socket.connect(f'tcp://localhost:{TFWENV.RECEIVER_PORT}')
         self._zmq_push_socket.setsockopt(zmq.SNDHWM, 0)
 
@@ -51,6 +48,10 @@ class ServerUplinkConnector(ZMQConnectorBase):
 
 
 class ServerConnector(ServerUplinkConnector, ServerDownlinkConnector):
+    def __init__(self):
+        ServerUplinkConnector.__init__(self)
+        ServerDownlinkConnector.__init__(self)
+
     def close(self):
         ServerUplinkConnector.close(self)
         ServerDownlinkConnector.close(self)
diff --git a/lib/tfw/networking/zmq_connector_base.py b/lib/tfw/networking/zmq_connector_base.py
deleted file mode 100644
index 47a850e..0000000
--- a/lib/tfw/networking/zmq_connector_base.py
+++ /dev/null
@@ -1,9 +0,0 @@
-# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
-# All Rights Reserved. See LICENSE file for details.
-
-import zmq
-
-
-class ZMQConnectorBase:
-    def __init__(self, zmq_context=None):
-        self._zmq_context = zmq_context or zmq.Context.instance()