Ghost v2 Update error with current node version

I have Ghost v 2.25.4 in my server. But i am unable to update it for v2 latest version and then v3, v4

i am getting CLI error.

✖ Downloading and updating Ghost to v2.38.3
A SystemError occurred.

Message: Ghost v2.38.3 is not compatible with the current Node version.

Debug Information:
    OS: Ubuntu, v16.04.7 LTS
    Node Version: v12.16.1
    Ghost Version: 2.25.4
    Ghost-CLI Version: 1.16.3
    Environment: production
    Command: 'ghost update v2'

What should i do now to update to Ghost v4


Your Node.Js version is incompatible.
It might be too high or too low. I’m not sure which versions are compatible, but I’m using V12 and it’s working fine.