diff --git a/homeassistant/components/izone/config_flow.py b/homeassistant/components/izone/config_flow.py
index add1bb47a54..a64356051d0 100644
--- a/homeassistant/components/izone/config_flow.py
+++ b/homeassistant/components/izone/config_flow.py
@@ -6,6 +6,7 @@ import logging
 from async_timeout import timeout
 
 from homeassistant import config_entries
+from homeassistant.core import callback
 from homeassistant.helpers import config_entry_flow
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 
@@ -18,9 +19,12 @@ _LOGGER = logging.getLogger(__name__)
 async def _async_has_devices(hass):
 
     controller_ready = asyncio.Event()
-    async_dispatcher_connect(
-        hass, DISPATCH_CONTROLLER_DISCOVERED, lambda x: controller_ready.set()
-    )
+
+    @callback
+    def dispatch_discovered(_):
+        controller_ready.set()
+
+    async_dispatcher_connect(hass, DISPATCH_CONTROLLER_DISCOVERED, dispatch_discovered)
 
     disco = await async_start_discovery_service(hass)
 
diff --git a/homeassistant/components/izone/manifest.json b/homeassistant/components/izone/manifest.json
index 1db99b1a0e3..4bdade41605 100644
--- a/homeassistant/components/izone/manifest.json
+++ b/homeassistant/components/izone/manifest.json
@@ -2,7 +2,7 @@
   "domain": "izone",
   "name": "iZone",
   "documentation": "https://www.home-assistant.io/integrations/izone",
-  "requirements": ["python-izone==1.1.2"],
+  "requirements": ["python-izone==1.1.3"],
   "codeowners": ["@Swamp-Ig"],
   "config_flow": true
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index b3e716dc8b8..f8ef5efdc4f 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1768,7 +1768,7 @@ python-gitlab==1.6.0
 python-hpilo==4.3
 
 # homeassistant.components.izone
-python-izone==1.1.2
+python-izone==1.1.3
 
 # homeassistant.components.joaoapps_join
 python-join-api==0.0.6
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 235bc93cd2a..468adca1ecb 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -882,7 +882,7 @@ python-ecobee-api==0.2.8
 python-forecastio==1.4.0
 
 # homeassistant.components.izone
-python-izone==1.1.2
+python-izone==1.1.3
 
 # homeassistant.components.juicenet
 python-juicenet==1.0.1