diff --git a/ai_ta_backend/service/export_service.py b/ai_ta_backend/service/export_service.py
index 3ceaabb7..fc51f86e 100644
--- a/ai_ta_backend/service/export_service.py
+++ b/ai_ta_backend/service/export_service.py
@@ -233,7 +233,7 @@ def export_data_in_bg(response, download_type, course_name, s3_path):
     print("file uploaded to s3: ", s3_file)
 
     # generate presigned URL
-    s3_url = s3.generatePresignedUrl('get_object', os.environ['S3_BUCKET_NAME'], s3_path, 3600)
+    s3_url = s3.generatePresignedUrl('get_object', os.environ['S3_BUCKET_NAME'], s3_path, 172800)
 
     # get admin email IDs
     headers = {