diff --git a/src/revpi_middleware/ios1/__init__.py b/src/revpi_middleware/ios1/__init__.py
index 7abf777..7f85762 100644
--- a/src/revpi_middleware/ios1/__init__.py
+++ b/src/revpi_middleware/ios1/__init__.py
@@ -2,4 +2,5 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus ios version 1 of revpi_middleware."""
+
 from .ios1_helper import REVPI_DBUS_BASE_PATH, REVPI_DBUS_NAME
diff --git a/src/revpi_middleware/ios1/bus_provider_io.py b/src/revpi_middleware/ios1/bus_provider_io.py
index 0659892..8c5f185 100644
--- a/src/revpi_middleware/ios1/bus_provider_io.py
+++ b/src/revpi_middleware/ios1/bus_provider_io.py
@@ -2,6 +2,7 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus bus provider for revpi_middleware."""
+
 from logging import getLogger
 from threading import Thread
 
diff --git a/src/revpi_middleware/ios1/interface_ios.py b/src/revpi_middleware/ios1/interface_ios.py
index 4788be8..a02d2ab 100644
--- a/src/revpi_middleware/ios1/interface_ios.py
+++ b/src/revpi_middleware/ios1/interface_ios.py
@@ -2,6 +2,7 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus interfaces for IOs."""
+
 from gi.overrides.GLib import Variant
 from pydbus.generic import signal
 from revpimodio2 import RevPiModIO, Cycletools
@@ -57,8 +58,10 @@ class InterfaceIoManager:
             interface = self._dc_io_interfaces[io_name]
             if ct.changed(interface.io):
                 interface.emit_io_change()
-                self.IoChanged(interface.io.name,
-                               Variant(interface.variant_type, interface.io.value))
+                self.IoChanged(
+                    interface.io.name,
+                    Variant(interface.variant_type, interface.io.value),
+                )
 
     def GetAllInputs(self) -> list[str]:
         return self.lst_inp