diff --git a/api/models/model.py b/api/models/model.py
index d1490d75c8..901e92284a 100644
--- a/api/models/model.py
+++ b/api/models/model.py
@@ -1012,7 +1012,9 @@ class Message(db.Model):  # type: ignore[name-defined]
                 sign_url = file_helpers.get_signed_file_url(upload_file_id)
             else:
                 continue
-
+            # if as_attachment is in the url, add it to the sign_url.
+            if "as_attachment" in url:
+                sign_url += "&as_attachment=true"
             re_sign_file_url_answer = re_sign_file_url_answer.replace(url, sign_url)
 
         return re_sign_file_url_answer