pve 4.0 upgrade to pve 4.2

[chiquitita]

I have 4 nodes in a pve4.0 cluster. Can I follow https://pve.proxmox.com/wiki/Upgrade_from_4.0_to_4.1_using_the_ISO_image to upgrade nodes from pve 4.0 to 4.2 or should I upgrade nodes from pve4.0 to pve4.1 first and then upgrade pve4.1 to pve4.2?

Sorry for my poor English. Thanks for your help!