diff --git a/homeassistant/components/broadlink/device.py b/homeassistant/components/broadlink/device.py
index 951be9b26bb..46582334e2d 100644
--- a/homeassistant/components/broadlink/device.py
+++ b/homeassistant/components/broadlink/device.py
@@ -12,8 +12,9 @@ from broadlink.exceptions import (
     NetworkTimeoutError,
 )
 
-from homeassistant.config_entries import SOURCE_REAUTH
+from homeassistant.config_entries import SOURCE_REAUTH, ConfigEntry
 from homeassistant.const import CONF_HOST, CONF_MAC, CONF_NAME, CONF_TIMEOUT, CONF_TYPE
+from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import device_registry as dr
 
@@ -64,13 +65,15 @@ class BroadlinkDevice:
         return self.update_manager.available
 
     @staticmethod
-    async def async_update(hass, entry):
+    async def async_update(hass: HomeAssistant, entry: ConfigEntry) -> None:
         """Update the device and related entities.
 
         Triggered when the device is renamed on the frontend.
         """
         device_registry = dr.async_get(hass)
+        assert entry.unique_id
         device_entry = device_registry.async_get_device({(DOMAIN, entry.unique_id)})
+        assert device_entry
         device_registry.async_update_device(device_entry.id, name=entry.title)
         await hass.config_entries.async_reload(entry.entry_id)