diff --git a/src/primaite/simulator/system/services/ntp/ntp_client.py b/src/primaite/simulator/system/services/ntp/ntp_client.py
index d1fe7bbf..0e3646ae 100644
--- a/src/primaite/simulator/system/services/ntp/ntp_client.py
+++ b/src/primaite/simulator/system/services/ntp/ntp_client.py
@@ -1,18 +1,17 @@
 from ipaddress import IPv4Address
 from typing import Dict, Optional
+
+from primaite import getLogger
 from primaite.simulator.network.protocols.ntp import NTPPacket
 from primaite.simulator.network.transmission.network_layer import IPProtocol
 from primaite.simulator.network.transmission.transport_layer import Port
 from primaite.simulator.system.services.service import Service
 
-
-from primaite import getLogger
-
 _LOGGER = getLogger(__name__)
 
 
 class NTPClient(Service):
-    """Represents a NTP client as a service"""
+    """Represents a NTP client as a service."""
 
     ntp_server: Optional[IPv4Address] = None
     "The NTP server the client sends requests to."
@@ -47,12 +46,12 @@ class NTPClient(Service):
         pass
 
     def send(
-            self,
-            payload: NTPPacket,
-            session_id: Optional[str] = None,
-            dest_ip_address: Optional[IPv4Address] = None,
-            dest_port: [Port] = Port.NTP,
-            **kwargs,
+        self,
+        payload: NTPPacket,
+        session_id: Optional[str] = None,
+        dest_ip_address: IPv4Address = ntp_server,
+        dest_port: [Port] = Port.NTP,
+        **kwargs,
     ) -> bool:
         """Requests NTP data from NTP server.
 
@@ -74,20 +73,18 @@ class NTPClient(Service):
         payload: NTPPacket,
         session_id: Optional[str] = None,
         **kwargs,
-    ):
-        """Receives time data from server
+    ) -> bool:
+        """Receives time data from server.
 
         :param payload: The payload to be sent.
         :param session_id: The Session ID the payload is to originate from. Optional.
         :return: True if successful, False otherwise.
         """
-        if not (isinstance(payload, NTPPacket) and
-                payload.ntp_request.ntp_client):
+        if not (isinstance(payload, NTPPacket) and payload.ntp_request.ntp_client):
             _LOGGER.debug(f"{payload} is not a NTPPacket")
             return False
 
         # XXX: compare received datetime with current time. Log error if differ by more than x ms?
         if payload.ntp_reply.ntp_datetime:
-            self.sys_log.info(
-                f"{self.name}: Received time update from NTP server{payload.ntp_reply.ntp_datetime}")
+            self.sys_log.info(f"{self.name}: Received time update from NTP server{payload.ntp_reply.ntp_datetime}")
             return True