diff --git a/scripts/upgrade b/scripts/upgrade
index 3d2f360..899e127 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -111,7 +111,11 @@ if [ ! -d "$data_dir/data" ]; then
 	ynh_script_progression --message="Adding a configuration directory..." --weight=5
 	mkdir "$data_dir/data"
 	chmod 770 "$data_dir/data"
-	chown -R $app:www-data "$data_dir/data/"
+	chown -R $app:www-data "$data_dir/data"
+else
+  chown -R $app:www-data "$data_dir/cache"
+  chown $app:www-data "$data_dir/index.html"
+
 fi
 
 if [ ! -f "$data_dir/data/config.local.user.php" ]; then