diff --git a/custom_components/owlet/sensor.py b/custom_components/owlet/sensor.py
index a3e23ad..6b8079f 100644
--- a/custom_components/owlet/sensor.py
+++ b/custom_components/owlet/sensor.py
@@ -170,4 +170,4 @@ class OwletSleepStateSensor(OwletBaseEntity, SensorEntity):
 
     @property
     def options(self) -> list[str]:
-        return SLEEP_STATES.values()
+        return list(SLEEP_STATES.values())