diff --git a/aperisolve/app.py b/aperisolve/app.py
index 370d280..f28b4cb 100644
--- a/aperisolve/app.py
+++ b/aperisolve/app.py
@@ -20,7 +20,9 @@ app: Flask = Flask(__name__)
 app.json.sort_keys = False  # type: ignore
 app.config["SQLALCHEMY_DATABASE_URI"] = os.environ.get("DB_URI")
 app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
-app.config["MAX_CONTENT_LENGTH"] = os.environ.get("MAX_CONTENT_LENGTH")
+app.config["MAX_CONTENT_LENGTH"] = int(
+    os.environ.get("MAX_CONTENT_LENGTH", 1024 * 1024)
+)
 RESULT_FOLDER.mkdir(parents=True, exist_ok=True)