Manager Karl Robinson and head of coaching Richie Barker have extended their contracts with MK Dons.
Robinson, whose previous deal was up next summer, led the Dons to the Championship for the first time in May, by finishing second in League One.
The 34-year-old has been in charge of the club since May 2010 and is the third longest-serving manager in England's top four divisions.
Barker has been part of Robinson's backroom staff for just over a year.
The former Bury, Crawley and Portsmouth boss initially assisted Robinson in an advisory role towards the end of the 2013-14 season before his appointment as head of coaching in May 2014.
The club have not publicised the length of the deals.