diff --git a/homeassistant/components/izone/climate.py b/homeassistant/components/izone/climate.py
index b21089d8baf..2498a671219 100644
--- a/homeassistant/components/izone/climate.py
+++ b/homeassistant/components/izone/climate.py
@@ -525,11 +525,6 @@ class ZoneDevice(ClimateEntity):
         """Return True if entity is available."""
         return self._controller.available
 
-    @property
-    def assumed_state(self) -> bool:
-        """Return True if unable to access real state of the entity."""
-        return self._controller.assumed_state
-
     @property
     def unique_id(self):
         """Return the ID of the controller device."""
diff --git a/homeassistant/components/izone/manifest.json b/homeassistant/components/izone/manifest.json
index 82927fef795..9cdf30ad42b 100644
--- a/homeassistant/components/izone/manifest.json
+++ b/homeassistant/components/izone/manifest.json
@@ -2,11 +2,11 @@
   "domain": "izone",
   "name": "iZone",
   "documentation": "https://www.home-assistant.io/integrations/izone",
-  "requirements": ["python-izone==1.1.8"],
+  "requirements": ["python-izone==1.2.3"],
   "codeowners": ["@Swamp-Ig"],
   "config_flow": true,
   "homekit": {
     "models": ["iZone"]
   },
-  "iot_class": "local_push"
+  "iot_class": "local_polling"
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index f25f09fdd31..1307dd09d74 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1901,7 +1901,7 @@ python-gitlab==1.6.0
 python-hpilo==4.3
 
 # homeassistant.components.izone
-python-izone==1.1.8
+python-izone==1.2.3
 
 # homeassistant.components.joaoapps_join
 python-join-api==0.0.6
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index ba6e4e42632..802e763f46c 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1148,7 +1148,7 @@ python-ecobee-api==0.2.14
 python-forecastio==1.4.0
 
 # homeassistant.components.izone
-python-izone==1.1.8
+python-izone==1.2.3
 
 # homeassistant.components.juicenet
 python-juicenet==1.0.2