diff --git a/custom_components/mylight_systems/const.py b/custom_components/mylight_systems/const.py
index efab179..480dff8 100644
--- a/custom_components/mylight_systems/const.py
+++ b/custom_components/mylight_systems/const.py
@@ -9,7 +9,7 @@
 NAME = "MyLight Systems"
 DOMAIN = "mylight_systems"
 PLATFORMS = [Platform.SENSOR, Platform.SWITCH]
-VERSION = "0.1.0"
+VERSION = "0.1.1"
 COORDINATOR = "coordinator"
 ATTRIBUTION = "Data provided by https://www.mylight-systems.com/"
 SCAN_INTERVAL_IN_MINUTES = 15
diff --git a/custom_components/mylight_systems/coordinator.py b/custom_components/mylight_systems/coordinator.py
index cb11c28..07a7709 100644
--- a/custom_components/mylight_systems/coordinator.py
+++ b/custom_components/mylight_systems/coordinator.py
@@ -78,9 +78,7 @@ async def _async_update_data(self) -> MyLightSystemsCoordinatorData:
             virtual_battery_id = self.config_entry.data[
                 CONF_VIRTUAL_BATTERY_ID
             ]
-            master_relay_id = self.config_entry.data[
-                CONF_MASTER_RELAY_ID
-            ]
+            master_relay_id = self.config_entry.data.get(CONF_MASTER_RELAY_ID, None)
 
             await self.authenticate_user(email, password)
 
@@ -92,9 +90,11 @@ async def _async_update_data(self) -> MyLightSystemsCoordinatorData:
                 self.__auth_token, virtual_battery_id
             )
 
-            master_relay_state = await self.client.async_get_relay_state(
-                self.__auth_token, master_relay_id
-            )
+            master_relay_state = None
+            if master_relay_id is not None:
+                master_relay_state = await self.client.async_get_relay_state(
+                    self.__auth_token, master_relay_id
+                )
 
             data = MyLightSystemsCoordinatorData(
                 produced_energy=self.find_measure_by_type(
diff --git a/custom_components/mylight_systems/manifest.json b/custom_components/mylight_systems/manifest.json
index f4908dc..1e3f29c 100644
--- a/custom_components/mylight_systems/manifest.json
+++ b/custom_components/mylight_systems/manifest.json
@@ -8,5 +8,5 @@
   "documentation": "https://github.com/acesyde/hassio_mylight_integration",
   "iot_class": "cloud_polling",
   "issue_tracker": "https://github.com/acesyde/hassio_mylight_integration/issues",
-  "version": "0.1.0"
+  "version": "0.1.1"
 }
diff --git a/pyproject.toml b/pyproject.toml
index 93cff29..23934b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "mylight_systems"
-version = "0.1.0"
+version = "0.1.1"
 description = "MyLight Systems integration for Home Assistant"
 authors = ["Pierre-Emmanuel Mercier <acesyde@gmail.com>"]
 license = "MIT"