OpenBSD posts a upgrade guide documentation link for the latest release on their faq page.
To verify at least 1.1 GB of space on
/usr run the following command:
df -h /usr
Upgrade the system by running:
System will reboot and run
sysmerge and you can proceed to step 4. In some cases, configuration files cannot be modified automatically, then run
sysmerge ater reboot.
pgk_add -u to updade all packages,
reboot, why not, enjoy.