Burton captain John Mousinho has signed a one-year contract extension which will keep him at the club until 2017.
The 29-year-old, who joined in the summer of 2014, led the Brewers to the League Two title last season and they are second in League One this term.
"Burton are going places," he said. "Everyone at the club is doing a fantastic job and it's a pleasure to be part of that."
Meanwhile, midfielder Robbie Weir, 26, has agreed a deal but has yet to sign.