diff --git a/msmart/cloud.py b/msmart/cloud.py
index 662401d7..7f89d5db 100644
--- a/msmart/cloud.py
+++ b/msmart/cloud.py
@@ -118,7 +118,7 @@ async def _api_request(self, endpoint: str, body: Dict[str, Any]) -> Optional[di
         # Sign the contents and add it to the header
         sign = self._security.sign(contents, random)
         headers = {
-            'Content-Type': 'application/json',
+            "Content-Type": "application/json",
             "secretVersion": "1",
             "sign": sign,
             "random": random,
@@ -212,7 +212,7 @@ async def get_token(self, udpid: str) -> Tuple[str, str]:
         """Get token and key for the provided udpid."""
 
         response = await self._api_request(
-            '/v1/iot/secure/getToken',
+            "/v1/iot/secure/getToken",
             self._build_request_body({"udpid": udpid})
         )
 
diff --git a/msmart/discover.py b/msmart/discover.py
index 180a43ce..8b39412b 100644
--- a/msmart/discover.py
+++ b/msmart/discover.py
@@ -248,9 +248,9 @@ def _get_device_version(cls, data: bytes) -> int:
 
             # Use start of packet data to differentiate between V2 and V3
             start_of_packet = data_mv[:2]
-            if start_of_packet == b'\x5a\x5a':
+            if start_of_packet == b"\x5a\x5a":
                 return 2
-            elif start_of_packet == b'\x83\x70':
+            elif start_of_packet == b"\x83\x70":
                 return 3
 
         raise DiscoverError()
@@ -307,7 +307,7 @@ async def _get_device_info(cls, ip: str, version: int, data: bytes) -> Dict[str,
                 encrypted_data = data_mv[40:-16]
 
                 # Extract ID
-                device_id = int.from_bytes(data_mv[20:26], 'little')
+                device_id = int.from_bytes(data_mv[20:26], "little")
 
                 # Attempt to decrypt the packet
                 try:
@@ -323,7 +323,7 @@ async def _get_device_info(cls, ip: str, version: int, data: bytes) -> Dict[str,
                 # Extract IP and port
                 ip_address = str(ipaddress.IPv4Address(
                     decrypted_mv[3::-1].tobytes()))
-                port = int.from_bytes(decrypted_mv[4:6], 'little')
+                port = int.from_bytes(decrypted_mv[4:6], "little")
 
                 if ip_address != ip:
                     _LOGGER.warning(
@@ -336,7 +336,7 @@ async def _get_device_info(cls, ip: str, version: int, data: bytes) -> Dict[str,
                 name_length = decrypted_mv[40]
                 name = decrypted_mv[41:41+name_length].tobytes().decode()
 
-                device_type = int(name.split('_')[1], 16)
+                device_type = int(name.split("_")[1], 16)
 
             # Return dictionary of device info
             return {"ip": ip_address, "port": port, "device_id": device_id, "name": name, "sn": sn, "device_type": device_type, "version": version}
diff --git a/msmart/lan.py b/msmart/lan.py
index dd34536f..92679d3b 100644
--- a/msmart/lan.py
+++ b/msmart/lan.py
@@ -77,7 +77,7 @@ def connection_made(self, transport) -> None:
         self._transport = transport
 
         # Save peer name for logging
-        peername = transport.get_extra_info('peername')
+        peername = transport.get_extra_info("peername")
         self._peer = self._format_socket_name(peername)
 
         _LOGGER.debug("Connected to %s.", self._peer)
@@ -660,11 +660,11 @@ def encode(cls, device_id: int, command: bytes) -> bytes:
 
         header = b"\x5A\x5A"  # Start of packet
         header += b"\x01\x11"  # Message type
-        header += length.to_bytes(2, 'little')  # Packet size
+        header += length.to_bytes(2, "little")  # Packet size
         header += b"\x20\x00"  # Magic bytes
         header += bytes(4)  # Message ID
         header += cls._timestamp()  # Timestamp
-        header += device_id.to_bytes(8, 'little')  # Device ID
+        header += device_id.to_bytes(8, "little")  # Device ID
         header += bytes(12)  # ???
 
         packet = header + encrypted_payload