upgrade
verb
• raise (something) to a higher standard, in particular improve (equipment or machinery) by adding or replacing components.
• "the cost of upgrading each workstation is around £300"
Similar:
improve,
better,
make better,
ameliorate,
reform,
enhance,
add to,
customize,
touch up,
rehabilitate,
refurbish,
recondition,
modernize,
update,
bring up to date,
renovate,
redecorate,
revamp,
restore,
remodel,
redo,
brighten up,
spruce up,
bring up to code,
do up,
fix up,
upgrade
noun
• an act of upgrading something.
• "a room upgrade from a twin to a duplex suite"