diff --git a/scripts/upgrade b/scripts/upgrade
index 4c79825..a7ac3ce 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -95,7 +95,8 @@ ynh_replace_string --match_string="//require '$data_dir/data/config.local.user.p
 if [ ! -d "$data_dir/data" ]; then
 	ynh_script_progression --message="Adding a configuration file..." --weight=5
 	mkdir "$data_dir/data"
-	chown $app:www-data "$data_dir/data"
+	chmod 770 "$data_dir/data"
+	chown -R $app:www-data "$data_dir/data"
 fi
 
 if [ ! -f "$data_dir/data/config.local.user.php" ]; then