diff --git a/api/src/dooris_api/mqtt_client.py b/api/src/dooris_api/mqtt_client.py
index a090c5f..505588a 100644
--- a/api/src/dooris_api/mqtt_client.py
+++ b/api/src/dooris_api/mqtt_client.py
@@ -78,6 +78,10 @@ class AsyncMqttClient:
         self.client.on_subscribe = self.on_subscribe
         self.client.on_unsubscribe = self.on_unsubscribe
         self.client.on_disconnect = self.on_disconnect
+        self.fut_disconnect = None
+        self.fut_connected = None
+        self.fut_subscribe = None
+        self.fut_unsubscribe = None
 
     def on_connect(
         self,