diff --git a/devolo_plc_api/device.py b/devolo_plc_api/device.py
index 4bf31a9..4bfdec8 100644
--- a/devolo_plc_api/device.py
+++ b/devolo_plc_api/device.py
@@ -171,12 +171,12 @@ async def _get_relevant_interfaces(self) -> list[str]:
         interface: list[str] = []
         for adapter in get_adapters():
             interface.extend(
-                cast(str, ip.ip)
+                cast("str", ip.ip)
                 for ip in adapter.ips
                 if ip.is_IPv4 and ip_address(self.ip) in ip_network(f"{ip.ip}/{ip.network_prefix}", strict=False)
             )
             interface.extend(
-                cast(str, ip.ip[0])
+                cast("str", ip.ip[0])
                 for ip in adapter.ips
                 if ip.is_IPv6 and ip_address(self.ip) in ip_network(f"{ip.ip[0]}/{ip.network_prefix}", strict=False)
             )
diff --git a/devolo_plc_api/network/__init__.py b/devolo_plc_api/network/__init__.py
index 88eab51..b741624 100644
--- a/devolo_plc_api/network/__init__.py
+++ b/devolo_plc_api/network/__init__.py
@@ -1,4 +1,5 @@
 """Discover devices in your network."""
+
 from __future__ import annotations
 
 import asyncio
@@ -69,6 +70,6 @@ def _interfaces() -> list[str]:
     """Get IP addresses not being localhost."""
     interface: list[str] = []
     for adapter in get_adapters():
-        interface.extend(cast(str, ip.ip) for ip in adapter.ips if ip.is_IPv4 and ip.ip != "127.0.0.1")
-        interface.extend(cast(str, ip.ip[0]) for ip in adapter.ips if ip.is_IPv6 and ip.ip[0] != "::1")
+        interface.extend(cast("str", ip.ip) for ip in adapter.ips if ip.is_IPv4 and ip.ip != "127.0.0.1")
+        interface.extend(cast("str", ip.ip[0]) for ip in adapter.ips if ip.is_IPv6 and ip.ip[0] != "::1")
     return interface