diff --git a/gazpar2haws/gazpar.py b/gazpar2haws/gazpar.py
index b31bb27..1cb52b2 100644
--- a/gazpar2haws/gazpar.py
+++ b/gazpar2haws/gazpar.py
@@ -182,7 +182,9 @@ async def _find_last_date_days_value(
         if exists_statistic_id:
             # Get the last statistic from Home Assistant
             try:
-                last_statistic = await self._homeassistant.get_last_statistic(entity_id, self._as_of_date, self._last_days)
+                last_statistic = await self._homeassistant.get_last_statistic(
+                    entity_id, self._as_of_date, self._last_days
+                )
             except HomeAssistantWSException:
                 Logger.warning(
                     f"Error while fetching last statistics from Home Assistant: {traceback.format_exc()}"
diff --git a/gazpar2haws/haws.py b/gazpar2haws/haws.py
index 87ffe5e..8f7c64b 100644
--- a/gazpar2haws/haws.py
+++ b/gazpar2haws/haws.py
@@ -158,7 +158,9 @@ async def statistics_during_period(
         return response
 
     # ----------------------------------
-    async def get_last_statistic(self, entity_id: str, as_of_date: datetime, depth_days: int) -> dict:
+    async def get_last_statistic(
+        self, entity_id: str, as_of_date: datetime, depth_days: int
+    ) -> dict:
 
         Logger.debug(f"Getting last statistic for {entity_id}...")
 
diff --git a/tests/test_haws.py b/tests/test_haws.py
index 87ae87f..16e51e8 100644
--- a/tests/test_haws.py
+++ b/tests/test_haws.py
@@ -77,7 +77,9 @@ async def test_get_last_statistic(self):
 
         await self._haws.connect()
 
-        statistics = await self._haws.get_last_statistic("sensor.gazpar2haws_volume", datetime.now(), 30)
+        statistics = await self._haws.get_last_statistic(
+            "sensor.gazpar2haws_volume", datetime.now(), 30
+        )
 
         assert statistics is not None
 
@@ -109,6 +111,8 @@ async def test_clear_statistics(self):
 
         await self._haws.connect()
 
-        await self._haws.clear_statistics(["sensor.gazpar2haws_energy", "sensor.gazpar2haws_volume"])
+        await self._haws.clear_statistics(
+            ["sensor.gazpar2haws_energy", "sensor.gazpar2haws_volume"]
+        )
 
         await self._haws.disconnect()