No one can hack your whatsapp.But still if you are worried then I think you should use updated versions of whatsapp like whatsapp plus, FM whatsapp,
GB whatsapp download and Yo whatsapp etc. You should try to use these versions Because all these versions of WhatsApp are end-to-end encrypted and one has the ability to hack these versions. If someone tries to take over your WhatsApp account, they will need the SMS verification code sent to your phone number. So don't share your verification code which is easy.