diff --git a/src/judas_client/connector.py b/src/judas_client/connector.py
index bbc4794..858d56e 100644
--- a/src/judas_client/connector.py
+++ b/src/judas_client/connector.py
@@ -107,7 +107,7 @@ class Connector:
     def send_hello(self) -> None:
         """Send a HELLO message to the server."""
         self.logger.debug("[*] Sending HELLO message...")
-        hello_message: Message = Message.hello(self.mac_address)
+        hello_message: Message = Message.Control.hello(self.mac_address)
         self.send(hello_message)
 
     def close(self) -> None:
@@ -218,7 +218,9 @@ class Connector:
                             self.on_message(message)
 
                         if message.ack_required:
-                            ack_message: Message = Message.ack(message.id)
+                            ack_message: Message = Message.Control.ack(
+                                message.id
+                            )
                             self.send(ack_message)
                             self._send_outbound()
                     except Exception as e: