diff --git a/scripts/upgrade b/scripts/upgrade
index 648fceb..19b5909 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -188,7 +188,7 @@ then
 					# This is a hack, but it will make outline_ynh users' lifes much easier !
 					if [ "$d" == "outlinestorage" ]
 					then
-						ynh_exec_warn_less sudo -u $app ./mc policy set public minio/outlinestorage
+						ynh_exec_warn_less sudo -u $app ./mc anonymous set public minio/outlinestorage
 					else
 						ynh_script_progression --message="Bucket is migrated and objects are now mirrored. However, make sure to set properly access policy of bucket $d. That part of the migration can't be automated, sorry ! You can log into the minio console to perform your changes."
 					fi