diff --git a/scripts/upgrade b/scripts/upgrade
index 958153d..6125542 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -33,4 +33,4 @@ sudo yunohost app ssowatconf
 sudo yunohost app setting ttrss skipped_uris -v "/public.php,/api"
 
 # Update database schema
-su - www-data -c "$final_path/update.php --update-schema --quiet"
+sudo su - www-data -c "$final_path/update.php --update-schema --quiet"