diff --git a/scirisweb/sw_app.py b/scirisweb/sw_app.py
index 6f3d536..a8631c3 100644
--- a/scirisweb/sw_app.py
+++ b/scirisweb/sw_app.py
@@ -576,7 +576,7 @@ def _do_RPC(self, verbose=False):
                 # because it is in use during the actual download, so we rely on
                 # later cleanup to remove download files.
             else:
-                response = send_file(bytesio, as_attachment=True, attachment_filename=output_name)
+                response = send_file(bytesio, as_attachment=True, download_name=output_name)
             response.headers['filename'] = output_name
             print(response)
             return response # Return the response message.