diff --git a/pyezviz/camera.py b/pyezviz/camera.py
index 6ea552d..0464e78 100644
--- a/pyezviz/camera.py
+++ b/pyezviz/camera.py
@@ -126,7 +126,7 @@ def _is_alarm_schedules_enabled(self):
         if time_plans:
             return bool(time_plans[0].get("enable"))
 
-        return "unknown"
+        return None
 
     def status(self):
         """Return the status of the camera."""
diff --git a/setup.py b/setup.py
index aac951d..7ad97a6 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name='pyezviz',
-    version="0.1.8.4",
+    version="0.1.8.5",
     license='Apache Software License 2.0',
     author='Pierre Ourdouille',
     author_email='baqs@users.github.com',