diff --git a/homeassistant/components/demo/light.py b/homeassistant/components/demo/light.py
index 25a7b46bfb6..21a7dd7440b 100644
--- a/homeassistant/components/demo/light.py
+++ b/homeassistant/components/demo/light.py
@@ -174,7 +174,7 @@ class DemoLight(LightEntity):
         return self._brightness
 
     @property
-    def color_mode(self) -> str | None:
+    def color_mode(self) -> ColorMode | None:
         """Return the color mode of the light."""
         return self._color_mode