diff --git a/api/src/dooris_api/app.py b/api/src/dooris_api/app.py
index 7e2a948..54f97f1 100644
--- a/api/src/dooris_api/app.py
+++ b/api/src/dooris_api/app.py
@@ -1,7 +1,6 @@
 from typing import Optional, List, AsyncIterable
 import logging
 import secrets
-import sys
 from datetime import datetime, UTC
 from fastapi import FastAPI, Request, Response, status
 from fastapi.responses import RedirectResponse
@@ -36,8 +35,7 @@ async def lifespan(app: FastAPI):
         auth=BasicAuth(app_cfg.ccujack_user, app_cfg.ccujack_password),
         mqtt_conn=app_cfg.ccujack_mqtt,
     )
-    await app.extra["ccujack"].connect_mqtt()
-    await app.extra["ccujack"].find_locks()
+    await app.extra["ccujack"].start()
 
     yield
 
diff --git a/api/src/dooris_api/ccujack.py b/api/src/dooris_api/ccujack.py
index 1132e63..9edbcdb 100644
--- a/api/src/dooris_api/ccujack.py
+++ b/api/src/dooris_api/ccujack.py
@@ -72,6 +72,7 @@ class CCUJackClient:
     locks: LockData
     param_values: Dict[str, Any]
     task_process_messages: asyncio.Task
+    task_find_locks: asyncio.Task
     data_updated: asyncio.Event
 
     def __init__(self, base_uri: str, auth: BasicAuth, mqtt_conn: str):
@@ -85,10 +86,16 @@ class CCUJackClient:
         self.locks = None
         self.param_values = dict()
         self.task_process_messages = None
+        self.task_find_locks = None
         self.data_updated = asyncio.Event()
 
-    async def connect_mqtt(self):
+    async def start(self):
         await self.mqtt.connect()
+        await self.find_locks()
+
+        self.task_find_locks = asyncio.get_running_loop().create_task(
+            self.cron(), name="ccujack-cron"
+        )
         self.task_process_messages = asyncio.get_running_loop().create_task(
             self.process_mqt_messages(), name="process-mqtt-messages"
         )
@@ -116,6 +123,7 @@ class CCUJackClient:
             # save the result
             new_locks = [i for i in device_infos if i[0].type == DEVICE_TYPE_LOCK]
             if new_locks != self.locks:
+                logger.info("Found new locks, updating state")
                 self.locks = new_locks
                 self.data_updated.set()
                 self.data_updated.clear()
@@ -148,6 +156,17 @@ class CCUJackClient:
             finally:
                 self.data_updated.clear()
 
+    async def cron(self):
+        while True:
+            try:
+
+                await asyncio.sleep(60 * 60) # 1 hour
+                logger.info("Running CCUJack cron")
+                await self.find_locks()
+
+            except Exception as e:
+                logger.exception(f"Error in CCUJack cron task: {e}")
+
     async def query_param_value(self, address: str) -> CCUValue:
         if address in self.param_values:
             return self.param_values[address]
diff --git a/api/src/dooris_api/mqtt_client.py b/api/src/dooris_api/mqtt_client.py
index 1548e66..03db2cc 100644
--- a/api/src/dooris_api/mqtt_client.py
+++ b/api/src/dooris_api/mqtt_client.py
@@ -3,7 +3,7 @@
 # https://github.com/eclipse-paho/paho.mqtt.python/blob/master/examples/loop_asyncio.py
 #
 
-from typing import Any, List, Set, Iterable
+from typing import Any, Set, Iterable
 import logging
 import asyncio
 import socket
@@ -132,6 +132,7 @@ class AsyncMqttClient:
             self.fut_subscribe = asyncio.get_running_loop().create_future()
             self.client.subscribe([(i, qos) for i in to_add])
             await self.fut_subscribe
+            self.active_subscriptions.update(to_add)
 
         to_remove = self.active_subscriptions.difference(topics)
         if to_remove:
@@ -139,6 +140,7 @@ class AsyncMqttClient:
             self.fut_unsubscribe = asyncio.get_running_loop().create_future()
             self.client.unsubscribe(list(to_remove))
             await self.fut_unsubscribe
+            self.active_subscriptions.difference_update(to_remove)
 
     async def connect(self):
         server_host, server_port = self.connection_string.rsplit(":", maxsplit=1)