Chesterfield manager Paul Cook has signed a one-year contract extension, tying him to the club until 2017.
The 47-year-old took over at the Proact Stadium in October 2012 and led them to promotion to League One last season.
The Spireites, who sold top scorer Eoin Doyle to Cardiff on Monday, are currently fifth in the table.
"In the two and a half years that Paul's been here, the progress has been there for all to see," chief executive Chris Turner told the club website.
"Out on the field of play we're challenging for a play-off spot and we've just sold our first million pound Chesterfield player.
"For the first time in a long time there's a very positive and bright looking future in front of us."
Cook's assistant Leam Richardson has also extended his deal with the club to the same end date.