diff --git a/app/app.py b/app/app.py
index 8f57d45..cc0fd04 100644
--- a/app/app.py
+++ b/app/app.py
@@ -9,7 +9,7 @@ from app.glob import get_config, get_manager
 frontend_dir = '../frontend/dist'
 
 
-def create_app():
+def create_app() -> Flask:
     app = Flask(__name__, static_url_path='/', static_folder=frontend_dir, template_folder=frontend_dir)
     api = Api(app, '/api/v1/')
     add_api_resources(api)