diff --git a/app.py b/app.py
index e5c2a37..439f39c 100644
--- a/app.py
+++ b/app.py
@@ -17,7 +17,7 @@ app = Flask(__name__)
 app.config['SECRET_KEY'] = config.FLASK_CONFIG['secret_key']
 app.config['SEND_FILE_MAX_AGE_DEFAULT'] = config.FLASK_CONFIG.get('static_cache_timeout', 60)
 # Bez Eventlet (deprecated) – prosty tryb wątkowy.
-socketio = SocketIO(app, cors_allowed_origins="*", async_mode='gevent', logger=False)
+socketio = SocketIO(app, cors_allowed_origins="*", logger=False)
 
 def get_file_hash(filename):
     full_path = os.path.join(app.static_folder, filename)