2up·grade 
/ˈʌpˌgreɪd/ noun
plural up·grades /ˈʌpˌgreɪd/ noun [count] 1 : an area or surface that goes upward : an upward slope
▪ a slight upgrade in the roadway ▪ a gradual upgrade 2 : an occurrence in which one thing is replaced by something better, newer, more valuable, etc.
▪ software/system upgrades ▪ The hotel offered us a room upgrade. ▪ seat upgrades
▪ a slight upgrade in the roadway ▪ a gradual upgrade
▪ software/system upgrades ▪ The hotel offered us a room upgrade. ▪ seat upgrades
