diff --git a/app/main.py b/app/main.py
index a93f0d6..88b8545 100644
--- a/app/main.py
+++ b/app/main.py
@@ -21,8 +21,7 @@ def checkDeps():
     if not MIFARE_APP_MASTER_KEY:
         logger.critical(f"MIFARE APP MASTER KEY not found!")
         logger.critical("Writing and reading cards is disabled!")
-        global disableCards
-        disableCards = True
+
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
@@ -30,7 +29,9 @@ async def lifespan(app: FastAPI):
     create_db_and_tables()
     create_first_user(db=get_db_session())
     logger.info("Database created and tables initialized.")
-    scanner.start()
+    disableCards = os.getenv("DISABLE_CARDS")
+    if not disableCards:
+        scanner.start()
     yield
     #scanner.stop()