diff --git a/scripts/upgrade b/scripts/upgrade
index 719c018..0bbe6be 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,6 +20,7 @@ app=$YNH_APP_INSTANCE_NAME
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+port=$(ynh_app_setting_get --app=$app --key=port)
 
 project_name=$(ynh_app_setting_get --app=$app --key=project_name)
 contact_url=$(ynh_app_setting_get --app=$app --key=contact_url)