Firmware updates

Hi

i got my cameras (Your Order #100007910) from your guys and its been top service, anyway i thought best update the firmware but can find the locations of it in the portal.

i've got

Hikvision DS-2CD2355FWD-I | 4mm 5MP Turret Network Camera DS-2CD2355FWD-I-4 1
Hikvision DS-7604NI-K1-4
Any help would be great, Cheers