Allow Whatsapp notifications from certain people on Do Not Disturb mode

Hi,

How can I allow messages from certain group or contact to come through on WhatsApp even when on DND?

I have added the people I'd like to get notifications from to the Favourite contacts list, but it only allows SMS-messages and straight phone calls or FaceTime calls to notify me. I would like to make whatsapp messages from the same people to also notify me even though DND is on. I have not found a way for the WhatsApp notifications though.

Does anyone know how to do that?

Thanks.