diff --git a/homeassistant/components/freedompro/fan.py b/homeassistant/components/freedompro/fan.py
index 3513b7672e0..443a1375f24 100644
--- a/homeassistant/components/freedompro/fan.py
+++ b/homeassistant/components/freedompro/fan.py
@@ -2,6 +2,7 @@
 from __future__ import annotations
 
 import json
+from typing import Any
 
 from pyfreedompro import put_state
 
@@ -87,27 +88,30 @@ class FreedomproFan(CoordinatorEntity, FanEntity):
         await super().async_added_to_hass()
         self._handle_coordinator_update()
 
-    async def async_turn_on(self, percentage=None, preset_mode=None, **kwargs):
+    async def async_turn_on(
+        self,
+        percentage: int | None = None,
+        preset_mode: str | None = None,
+        **kwargs: Any,
+    ) -> None:
         """Async function to turn on the fan."""
         payload = {"on": True}
-        payload = json.dumps(payload)
         await put_state(
             self._session,
             self._api_key,
             self.unique_id,
-            payload,
+            json.dumps(payload),
         )
         await self.coordinator.async_request_refresh()
 
-    async def async_turn_off(self, **kwargs):
+    async def async_turn_off(self, **kwargs: Any) -> None:
         """Async function to turn off the fan."""
         payload = {"on": False}
-        payload = json.dumps(payload)
         await put_state(
             self._session,
             self._api_key,
             self.unique_id,
-            payload,
+            json.dumps(payload),
         )
         await self.coordinator.async_request_refresh()