diff --git a/README.md b/README.md
index 4aa1912..fb54061 100644
--- a/README.md
+++ b/README.md
@@ -6,18 +6,19 @@ All configuration is handled through environment variables.
 
 | Name                            | Default                                                                 | Description                                                                              |
 |---------------------------------|-------------------------------------------------------------------------|------------------------------------------------------------------------------------------|
-| `HMDOORIS_ALLOWED_IPS`          | -                                                                       | List of IP addresses in CIDR notation that are allowed to control the locks              |
-| `HMDOORIS_URL`                  | `http://localhost:3000`                                                 | URL of the application, used to construct links to itself                                |
-| `HMDOORIS_DISCOVERY_URL`        | `http://localhost:8080/realms/testing/.well-known/openid-configuration` | OIDC configuration discovery URL                                                         |
-| `HMDOORIS_CLIENT_ID`            | `hmdooris`                                                              | OIDC client ID                                                                           |
-| `HMDOORIS_CLIENT_SECRET`        | -                                                                       | ODIC client secret for the confidential flow                                             |
+| `HMDOORIS_ALLOWED_IPS`          | -                                                                       | List of IP addresses in CIDR notation that are allowed to control the locks.             |
+| `HMDOORIS_DISCOVERY_URL`        | `http://localhost:8080/realms/testing/.well-known/openid-configuration` | OIDC configuration discovery URL.                                                        |
+| `HMDOORIS_CCUJACK_URL`          | `https://raspberrymatic:2122`                                           | URL of the CCU Jack server.                                                              |
+| `HMDOORIS_CCU_CERTIFICATE_PATH` | -                                                                       | File of a private certificate, or `false`.                                               |
+| `HMDOORIS_CCUJACK_USERNAME`     | -                                                                       | Username in CCU Jack.                                                                    |
+| `HMDOORIS_CCUJACK_PASSWORD`     | -                                                                       | Password in CCU Jack.                                                                    |
+| `HMDOORIS_CLIENT_ID`            | `hmdooris`                                                              | OIDC client ID.                                                                          |
+| `HMDOORIS_CLIENT_SECRET`        | -                                                                       | ODIC client secret for the confidential flow.                                            |
+| `HMDOORIS_LISTEN`               | `127.0.0.1:3000`                                                        | Which IP and port to listen on.                                                          |
 | `IDINVITE_OIDC_SCOPE`           | `["openid", "email", "profile"]`                                        | JSON list of OIDC scopes to request. The OIDC IDP will need to send the group attribute. |
-| `IDINVITE_OIDC_USER_ATTR`       | `email`                                                                 | The attribute to use as the user ID                                                      |
+| `IDINVITE_OIDC_USER_ATTR`       | `email`                                                                 | The attribute to use as the user ID.                                                     |
 | `HMDOORIS_REQUIRES_GROUP`       | -                                                                       | Set to require users to be a member of this groups.                                      |
-| `HMDOORIS_CCUJACK_URL`          | `https://raspberrymatic:2122`                                           | URL of the CCU Jack server                                                               |
-| `HMDOORIS_CCU_CERTIFICATE_PATH` | -                                                                       | File of a private certificate, or `false`                                                |
-| `HMDOORIS_CCUJACK_USERNAME`     | -                                                                       | Username in CCU Jack                                                                     |
-| `HMDOORIS_CCUJACK_PASSWORD`     | -                                                                       | Password in CCU Jack                                                                     |
+| `HMDOORIS_URL`                  | `http://localhost:3000`                                                 | URL of the application, used to construct links to itself.                               |
 
 ### Required Group
 
diff --git a/hmdooris/AppConfig.py b/hmdooris/AppConfig.py
index 8d28c69..d790909 100644
--- a/hmdooris/AppConfig.py
+++ b/hmdooris/AppConfig.py
@@ -19,6 +19,7 @@ class AppConfig:
         self.staticpath = path.join(self.basepath, "static")
         self.templatepath = path.join(self.basepath, "templates")
         self.url = getenv('HMDOORIS_URL', 'http://localhost:3000')
+        (self.listen_host, self.listen_port) = getenv('HMDOORIS_LISTEN', '127.0.0.1:3000').split(':')
         self.discovery_url = getenv('HMDOORIS_DISCOVERY_URL',
                                     'http://localhost:8080/realms/testing/.well-known/openid-configuration')
         self.client_id = getenv('HMDOORIS_CLIENT_ID', 'hmdooris')
@@ -56,5 +57,4 @@ class AppConfig:
 
         self.oidc = {
             'client_id': self.client_id,
-
         }
diff --git a/hmdooris/__main__.py b/hmdooris/__main__.py
index 7b32be3..0943206 100644
--- a/hmdooris/__main__.py
+++ b/hmdooris/__main__.py
@@ -89,4 +89,4 @@ def post_api_lock(id):
     return ccujack.lock_unlock(id, request.json["locking"])
 
 if __name__ == '__main__':
-    app.run(host='localhost', port=3000, server=GeventWebSocketServer, debug=config.debug, quiet=not config.debug)
+    app.run(host=config.listen_host, port=config.listen_port, server=GeventWebSocketServer, debug=config.debug, quiet=not config.debug)