diff --git a/homeassistant/components/qbittorrent/sensor.py b/homeassistant/components/qbittorrent/sensor.py
index 1b34bda7a44..151055a1688 100644
--- a/homeassistant/components/qbittorrent/sensor.py
+++ b/homeassistant/components/qbittorrent/sensor.py
@@ -113,7 +113,7 @@ class QBittorrentSensor(SensorEntity):
         self._attr_name = f"{client_name} {description.name}"
         self._attr_available = False
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data from qBittorrent and updates the state."""
         try:
             data = self.client.sync_main_data()
diff --git a/homeassistant/components/qnap/sensor.py b/homeassistant/components/qnap/sensor.py
index 7366dc5dc41..8c093eb9232 100644
--- a/homeassistant/components/qnap/sensor.py
+++ b/homeassistant/components/qnap/sensor.py
@@ -330,7 +330,7 @@ class QNAPSensor(SensorEntity):
             )
         return f"{server_name} {self.entity_description.name}"
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data for the states."""
         self._api.update()