diff --git a/Dockerfile b/Dockerfile
index 545d875..e49afc8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,9 +2,10 @@ FROM python:3-alpine
 
 COPY requirements.txt /code/requirements.txt
 RUN pip install -r /code/requirements.txt
-RUN echo '*/5 * * * * python3 /code/main.py' | crontab -
+RUN echo '0 1,13 * * * python3 /code/main.py' | crontab -
 COPY . /code
 
 WORKDIR /code
 
-CMD ["/usr/sbin/crond", "-f", "-d", "0"]
+EXPOSE 5000
+ENTRYPOINT ["/code/entrypoint.sh"]
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100755
index 0000000..5c18b4e
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+crond
+flask --app main run -h 0.0.0.0
diff --git a/main.py b/main.py
index 160cb1d..093bf30 100755
--- a/main.py
+++ b/main.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 
 from dolibarrpy import Dolibarrpy
+from flask import Flask, abort, request
 from ldap3 import ALL, Connection, ObjectDef, Reader, Server, WritableEntry, Writer
 
 import config
@@ -122,5 +123,26 @@ def append_extra_fields_to_ldap_group(ldap_group: WritableEntry, dolibarr_group:
             setattr(ldap_group, ldap_attr, value)
 
 
+flask_app = Flask(__name__)
+
+@flask_app.post('/webhook')
+def webhook_receiver():
+    data = request.json
+    if 'triggercode' not in data or 'object' not in data:
+        abort(400)
+    triggercode = data['triggercode']
+    obj = data['object']
+    ldap_server = Server(config.LDAP_HOST, config.LDAP_PORT, get_info=ALL)
+    if triggercode.startswith('USER_'):
+        with Connection(ldap_server, config.LDAP_BIND_USER, config.LDAP_BIND_PASSWORD) as ldap_conn:
+            manage_user_extra_fields(ldap_conn, obj)
+    elif triggercode.startswith('GROUP_'):
+        with Connection(ldap_server, config.LDAP_BIND_USER, config.LDAP_BIND_PASSWORD) as ldap_conn:
+            manage_group_extra_fields(ldap_conn, obj)
+    else:
+        abort(400)
+    return "", 204
+
+
 if __name__ == '__main__':
     main()
diff --git a/requirements.txt b/requirements.txt
index 4337eff..739f7c4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+flask
 ldap3
 dolibarrpy
 icecream