diff --git a/custom_components/bedste_lectio/__init__.py b/custom_components/bedste_lectio/__init__.py
index 30c3704..db65973 100644
--- a/custom_components/bedste_lectio/__init__.py
+++ b/custom_components/bedste_lectio/__init__.py
@@ -14,9 +14,7 @@
 from .const import CONF_SCHOOL, DOMAIN
 from .coordinator import BedsteLectioDataUpdateCoordinator
 
-PLATFORMS: list[Platform] = [
-    Platform.SENSOR
-]
+PLATFORMS: list[Platform] = [Platform.SENSOR]
 
 
 # https://developers.home-assistant.io/docs/config_entries_index/#setting-up-an-entry
diff --git a/custom_components/bedste_lectio/api.py b/custom_components/bedste_lectio/api.py
index e771733..e6b9ef1 100644
--- a/custom_components/bedste_lectio/api.py
+++ b/custom_components/bedste_lectio/api.py
@@ -14,15 +14,11 @@ class BedsteLectioApiClientError(Exception):
     """Exception to indicate a general API error."""
 
 
-class BedsteLectioApiClientCommunicationError(
-    BedsteLectioApiClientError
-):
+class BedsteLectioApiClientCommunicationError(BedsteLectioApiClientError):
     """Exception to indicate a communication error."""
 
 
-class BedsteLectioApiClientAuthenticationError(
-    BedsteLectioApiClientError
-):
+class BedsteLectioApiClientAuthenticationError(BedsteLectioApiClientError):
     """Exception to indicate an authentication error."""
 
 
@@ -45,11 +41,13 @@ def __init__(
     async def async_get_next_room(self) -> any:
         """Get next room from the API."""
         return await self._api_wrapper(
-            method="get", url=f"{BEDSTELECTIO_API_URL}/ha/frontpage", headers={
+            method="get",
+            url=f"{BEDSTELECTIO_API_URL}/ha/frontpage",
+            headers={
                 "username": self._username,
                 "password": self._password,
                 "school": self._school,
-            }
+            },
         )
 
     async def async_get_schools(self) -> list[str]:
diff --git a/custom_components/bedste_lectio/config_flow.py b/custom_components/bedste_lectio/config_flow.py
index 641c91c..07a88d8 100644
--- a/custom_components/bedste_lectio/config_flow.py
+++ b/custom_components/bedste_lectio/config_flow.py
@@ -86,7 +86,9 @@ async def async_step_user(
             errors=_errors,
         )
 
-    async def _test_credentials(self, username: str, password: str, school: str) -> None:
+    async def _test_credentials(
+        self, username: str, password: str, school: str
+    ) -> None:
         """Validate credentials."""
         client = BedsteLectioApiClient(
             username=username,
diff --git a/custom_components/bedste_lectio/sensor.py b/custom_components/bedste_lectio/sensor.py
index a9d8d2b..3e8be44 100644
--- a/custom_components/bedste_lectio/sensor.py
+++ b/custom_components/bedste_lectio/sensor.py
@@ -45,21 +45,27 @@ def get_next_room(entries: list[dict[str, str]]) -> dict[str, str]:
 
     rooms = []
     for entry in entries:
-        dt_str =re.sub(r"(?<!\d)(\d)(?!\d)", "0\\1", entry["tidspunkt"].split(" til")[0])
-        date = datetime.strptime(dt_str, "%d/%m-%Y %H:%M").replace(tzinfo=ZoneInfo("Europe/Copenhagen"))
+        dt_str = re.sub(
+            r"(?<!\d)(\d)(?!\d)", "0\\1", entry["tidspunkt"].split(" til")[0]
+        )
+        date = datetime.strptime(dt_str, "%d/%m-%Y %H:%M").replace(
+            tzinfo=ZoneInfo("Europe/Copenhagen")
+        )
         if date < datetime.now().astimezone(ZoneInfo("Europe/Copenhagen")):
             continue
 
-        rooms.append({
-            "room": entry.get("lokale", "N/A"),
-            "activity": entry.get("navn") or entry.get("hold", "N/A"),
-            "class": entry.get("hold", "N/A"),
-            "teacher": entry.get("lærer", "N/A"),
-            "start": date,
-        })
+        rooms.append(
+            {
+                "room": entry.get("lokale", "N/A"),
+                "activity": entry.get("navn") or entry.get("hold", "N/A"),
+                "class": entry.get("hold", "N/A"),
+                "teacher": entry.get("lærer", "N/A"),
+                "start": date,
+            }
+        )
 
     if rooms:
-        return rooms[0] # The first entry is closest to now that hasn't passed
+        return rooms[0]  # The first entry is closest to now that hasn't passed
     else:
         return {
             "room": "N/A",
@@ -94,7 +100,9 @@ def extra_state_attributes(self) -> dict[str, any]:
         """Return the state attributes of the entity."""
         entries = self.coordinator.data.get("skema")
         data = get_next_room(entries)
-        data.update({
-            "last_update": datetime.now().astimezone(ZoneInfo("Europe/Copenhagen")),
-        })
+        data.update(
+            {
+                "last_update": datetime.now().astimezone(ZoneInfo("Europe/Copenhagen")),
+            }
+        )
         return data