Chris Wilder says David Brooks fully deserves to be rewarded with a new and improved long-term contact at the club.
But the Blades boss is also demanding the 20-year-old to continue his progress in the Championship this term.
The manager commented: "He is a very important player and that's why he has been rewarded with a new contract.
"We have to make sure we do things in the correct way for the football club and we believe in rewarding good performances.
"David has been in sparkling form and he is a valued member of the squad, he isn't making the numbers up.
"He is capable of starting or coming off the bench as our first change more often than not, so we're delighted to tie him down and we want to see him kick on."
Speaking more broadly about extending the contracts of other key players, Wilder added: "We're not going to leave contracts until the end of the season and have players wondering what's happening, we're planning all the time.
"We've done the same with John Fleck and we will do something similar with the players we believe will move forward with the club.
"We're building on a fantastic first season and an excellent start to the second."