diff --git a/pykirdy/driver/kirdy_async.py b/pykirdy/driver/kirdy_async.py
index 4065f98..d63e6ff 100644
--- a/pykirdy/driver/kirdy_async.py
+++ b/pykirdy/driver/kirdy_async.py
@@ -93,15 +93,18 @@ class Device:
         self._read_response = read_response
         self._cmd_lock = cmd_lock
 
-    async def set_ip_settings(self, addr=[192, 168, 1, 128], port=1337, prefix_len=24, gateway=[192, 168, 1, 1]):
+    async def set_ip_settings(self, addr="192.168.1.128", port=1337, prefix_len=24, gateway="192.168.1.1"):
         """
             After calling this fn, the ip settings are immediately saved into flash and will be effective on next reboot.
         """
-        if not(isinstance(addr, list) and isinstance(gateway, list)):
-            raise InvalidDataType
-
-        if not(len(addr) == 4 and len(gateway) == 4):
+        try:
+            socket.inet_aton(addr)
+            socket.inet_aton(gateway)
+        except OSError:
             raise InvalidDataType
+        
+        addr = addr.split(".")
+        gateway = gateway.split(".")
 
         if not(isinstance(port, int) and isinstance(prefix_len, int)):
             raise InvalidDataType