diff --git a/src/api/routes.py b/src/api/routes.py
index f0ef116..c9d2859 100644
--- a/src/api/routes.py
+++ b/src/api/routes.py
@@ -219,7 +219,7 @@ async def get_file_records(filename: str, db_session: AsyncSession = Depends(get
             "file_size": stp_file.file_size,
             "upload_time": task.created_time.isoformat() if task.created_time else "",
             "status": task.status,
-            "completed_at": task.completed_at.isoformat() if task.completed_at else "",
+            "completed_at": task.completed_time.isoformat() if task.completed_time else "",
             "geometry_data": task.geometry_data,
             "cavity_data": task.cavity_data
         })