diff --git a/custom_components/audiconnect/config_flow.py b/custom_components/audiconnect/config_flow.py
index 2c174267..eb1ffa1d 100644
--- a/custom_components/audiconnect/config_flow.py
+++ b/custom_components/audiconnect/config_flow.py
@@ -20,6 +20,7 @@
     MIN_UPDATE_INTERVAL,
     CONF_SCAN_INITIAL,
     CONF_SCAN_ACTIVE,
+    REGIONS,
 )
 
 _LOGGER = logging.getLogger(__name__)
@@ -52,7 +53,7 @@ async def async_step_user(self, user_input=None):
             self._username = user_input[CONF_USERNAME]
             self._password = user_input[CONF_PASSWORD]
             self._spin = user_input.get(CONF_SPIN)
-            self._region = user_input.get(CONF_REGION)
+            self._region = REGIONS[user_input.get(CONF_REGION)]
             self._scan_interval = user_input[CONF_SCAN_INTERVAL]
 
             try:
@@ -94,7 +95,7 @@ async def async_step_user(self, user_input=None):
         data_schema[vol.Required(CONF_USERNAME, default=self._username)] = str
         data_schema[vol.Required(CONF_PASSWORD, default=self._password)] = str
         data_schema[vol.Optional(CONF_SPIN, default=self._spin)] = str
-        data_schema[vol.Optional(CONF_REGION, default=self._region)] = str
+        data_schema[vol.Required(CONF_REGION, default=self._region)] = vol.In(REGIONS)
         data_schema[
             vol.Optional(CONF_SCAN_INTERVAL, default=DEFAULT_UPDATE_INTERVAL)
         ] = int
@@ -116,7 +117,7 @@ async def async_step_import(self, user_input):
 
         region = "DE"
         if user_input.get(CONF_REGION):
-            region = user_input.get(CONF_REGION)
+            region = REGIONS[user_input.get(CONF_REGION)]
 
         scan_interval = DEFAULT_UPDATE_INTERVAL
 
diff --git a/custom_components/audiconnect/const.py b/custom_components/audiconnect/const.py
index 3a68d52c..08485784 100644
--- a/custom_components/audiconnect/const.py
+++ b/custom_components/audiconnect/const.py
@@ -77,3 +77,15 @@
     "device_tracker": "device_tracker",
     "switch": "switch",
 }
+
+REGION_EUROPE: str = "DE"
+REGION_CANADA: str = "CA"
+REGION_USA: str = "US"
+REGION_CHINA: str = "CN"
+
+REGIONS = {
+    1: REGION_EUROPE,
+    2: REGION_CANADA,
+    3: REGION_USA,
+    4: REGION_CHINA,
+}
diff --git a/readme.md b/readme.md
index 88bfc445..64610499 100644
--- a/readme.md
+++ b/readme.md
@@ -44,7 +44,7 @@ Configuration is done through the Home Assistant UI.
 
 To add the integration, go to **Settings ➤ Devices & Services ➤ Integrations**, click **➕ Add Integration**, and search for "Audi Connect".
 
-![Configuration](ha_config.png)
+![image](https://github.com/user-attachments/assets/facff84e-f40f-4090-9e44-80f698385426)
 
 ### Configuration Variables
 
@@ -62,7 +62,7 @@ To add the integration, go to **Settings ➤ Devices & Services ➤ Integrations
 
 **region**
 
-- (string)(Optional) The region where your Audi Connect account is registered.
+- (string)(Required) The region where your Audi Connect account is registered.
   - 'DE' for Europe (or leave unset)
   - 'US' for United States of America
   - 'CA' for Canada