How to update shipping rates on changing postcode in guest checkout address form?

Hi guys.

I’m trying to create a module with custom shipping method. So I’ve followed the http://inchoo.net/magento-2/creating-a-shipping-method-in-magento-2/ tutorial to create it. https://magento.stackexchange.com/questions/163152 and http://devdocs.magento.com/guides/v2.0/howdoi/checkout/checkout_carrier.html to configure shipping carrier validations.

The problem is, if I change the zip/postcode, the shipping’s value does not change. My question is, how can I update the shipping cost value when customer update its address information (postcode to be more specific)? Or when we use the guest-checkout and there is no address information?

Thanks in advance.