diff --git a/backend/src/database/engine.py b/backend/src/database/engine.py
index 110dbc8..bf2b47e 100644
--- a/backend/src/database/engine.py
+++ b/backend/src/database/engine.py
@@ -41,7 +41,7 @@ else:
             host=settings.DB_HOST,
             port=settings.DB_PORT,
             database=settings.DB_NAME,
-            json_serializer=_custom_json_serializer,
         ),
+        json_serializer=_custom_json_serializer,
         pool_pre_ping=True,
     )