diff --git a/homeassistant/components/climate/mill.py b/homeassistant/components/climate/mill.py
index a533cc37fd308e..f4615ee6517fb0 100644
--- a/homeassistant/components/climate/mill.py
+++ b/homeassistant/components/climate/mill.py
@@ -19,7 +19,7 @@
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
-REQUIREMENTS = ['millheater==0.2.2']
+REQUIREMENTS = ['millheater==0.2.3']
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -112,16 +112,17 @@ def name(self):
     @property
     def device_state_attributes(self):
         """Return the state attributes."""
-        if self._heater.room:
-            room = self._heater.room.name
-        else:
-            room = "Independent device"
-        return {
-            "room": room,
+        res = {
             "open_window": self._heater.open_window,
             "heating": self._heater.is_heating,
             "controlled_by_tibber": self._heater.tibber_control,
         }
+        if self._heater.room:
+            res['room'] = self._heater.room.name
+            res['avg_room_temp'] = self._heater.room.avg_temp
+        else:
+            res['room'] = "Independent device"
+        return res
 
     @property
     def temperature_unit(self):
diff --git a/requirements_all.txt b/requirements_all.txt
index cb687de6551f8e..4b9abdf26dd3a3 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -619,7 +619,7 @@ mficlient==0.3.0
 miflora==0.4.0
 
 # homeassistant.components.climate.mill
-millheater==0.2.2
+millheater==0.2.3
 
 # homeassistant.components.sensor.mitemp_bt
 mitemp_bt==0.0.1