diff --git a/config.json.example b/config.json.example
index f41fc53..416e21b 100644
--- a/config.json.example
+++ b/config.json.example
@@ -1,4 +1,5 @@
 {
     "apiurl": "http://localhost:8080",
-    "number": "+4900000000001"
+    "number": "+4900000000001",
+    "lab_cleaning_signal_base_group": "group.00000000000000000000000000000000000000000000000000000000000="
 }
diff --git a/main.py b/main.py
index c484df4..5cf97e4 100644
--- a/main.py
+++ b/main.py
@@ -17,6 +17,7 @@ from sqlmodel import Session, SQLModel, create_engine, select
 class Config(BaseModel):
     apiurl: str
     number: str
+    lab_cleaning_signal_base_group: str
 
 def signal_timestamp_to_datetime(timestamp: str) -> datetime.datetime:
     return datetime.datetime.fromtimestamp(int(timestamp)/1000)
@@ -503,7 +504,7 @@ You have time to answer for {format_seconds(task.timeout)}."""
 async def main(config: Config, session: Session):
     api = SignalAPI(config.apiurl, config.number)
 
-    bot = LabCleaningBot(api, "group.bm5KT3NJUW5FdkpRNnR2ZGRFa01oOVZBeUYrVkdnd3NNTzFpNWdsR2pwUT0=")
+    bot = LabCleaningBot(api, config.lab_cleaning_signal_base_group)
 
     await asyncio.gather(
         bot.receiver(session),