Error in Logs after upgraded 0.36.1

I just noticed in my log file this exception after I upgraded HA to 0.36.1

Anyone has any idea? was it because of some of my components? I can’t really tell…

17-01-18 00:31:49 homeassistant.core: Error doing job: Task exception was never retrieved
Traceback (most recent call last):
File “/usr/lib/python3.4/asyncio/”, line 233, in _step
result = coro.throw(exc)
File “/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/helpers/”, line 387, in _update_entity_states
yield from update_coro
File “/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/helpers/”, line 216, in async_update_ha_state
yield from self.hass.loop.run_in_executor(None, self.update)
File “/usr/lib/python3.4/asyncio/”, line 388, in iter
yield self # This tells Task to wait for completion.
File “/usr/lib/python3.4/asyncio/”, line 286, in _wakeup
value = future.result()
File “/usr/lib/python3.4/asyncio/”, line 277, in result
raise self._exception
File “/usr/lib/python3.4/concurrent/futures/”, line 54, in run
result = self.fn(*self.args, **self.kwargs)
File “/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/components/cover/”, line 142, in update
self._state = int(payload)
ValueError: invalid literal for int() with base 10: ‘null’

I think I figured out.

File “/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/components/cover/”, line 142, in update
self._state = int(payload)

That is my cover component. I need to fix it.