diff --git a/scripts/upgrade b/scripts/upgrade
index 5128331..7d9edc8 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -18,6 +18,7 @@ app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
+is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 port=$(ynh_app_setting_get --app=$app --key=port)
 always_encrypt=$(ynh_app_setting_get --app=$app --key=always_encrypt)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)