diff --git a/homeassistant/components/advantage_air/select.py b/homeassistant/components/advantage_air/select.py
index 9cfece25b24..97ec0f9705c 100644
--- a/homeassistant/components/advantage_air/select.py
+++ b/homeassistant/components/advantage_air/select.py
@@ -46,11 +46,11 @@ class AdvantageAirMyZone(AdvantageAirAcEntity, SelectEntity):
                 self._attr_options.append(zone["name"])
 
     @property
-    def current_option(self):
+    def current_option(self) -> str:
         """Return the current MyZone."""
         return self._number_to_name[self._ac["myZone"]]
 
-    async def async_select_option(self, option):
+    async def async_select_option(self, option: str) -> None:
         """Set the MyZone."""
         await self.async_change(
             {self.ac_key: {"info": {"myZone": self._name_to_number[option]}}}
diff --git a/homeassistant/components/xiaomi_miio/select.py b/homeassistant/components/xiaomi_miio/select.py
index b7e6a65775e..7f6f8ce1cb1 100644
--- a/homeassistant/components/xiaomi_miio/select.py
+++ b/homeassistant/components/xiaomi_miio/select.py
@@ -164,7 +164,7 @@ class XiaomiAirHumidifierSelector(XiaomiSelector):
             self.async_write_ha_state()
 
     @property
-    def current_option(self):
+    def current_option(self) -> str:
         """Return the current option."""
         return self.led_brightness.lower()
 
diff --git a/homeassistant/components/yamaha_musiccast/select.py b/homeassistant/components/yamaha_musiccast/select.py
index d57d1c07f68..475d32311ed 100644
--- a/homeassistant/components/yamaha_musiccast/select.py
+++ b/homeassistant/components/yamaha_musiccast/select.py
@@ -52,11 +52,11 @@ class SelectableCapapility(MusicCastCapabilityEntity, SelectEntity):
         return DEVICE_CLASS_MAPPING.get(self.capability.id)
 
     @property
-    def options(self):
+    def options(self) -> list[str]:
         """Return the list possible options."""
         return list(self.capability.options.values())
 
     @property
-    def current_option(self):
+    def current_option(self) -> str | None:
         """Return the currently selected option."""
         return self.capability.options.get(self.capability.current)