diff --git a/addons/website_sale_digital/controllers/main.py b/addons/website_sale_digital/controllers/main.py
index b633596a0bf..7977b44bac8 100644
--- a/addons/website_sale_digital/controllers/main.py
+++ b/addons/website_sale_digital/controllers/main.py
@@ -101,6 +101,6 @@ class WebsiteSaleDigital(website_account):
                 return request.not_found()
         elif attachment["datas"]:
             data = StringIO(base64.standard_b64decode(attachment["datas"]))
-            return http.send_file(data, filename=attachment['name'], as_attachment=True)
+            return http.send_file(data, filename=attachment['name'].encode('utf-8'), as_attachment=True)
         else:
             return request.not_found()