Chesterfield have reached an agreement with Doncaster Rovers to keep Alex Kiwomya and Alfie Beestin on extended loans.
Kiwomya, who joined the Spireites in October, will spend the rest of the season at the Proact and Beestin's loan has been extended until February 14.
Kiwomya has scored three goals in seven appearances for Chesterfield while Beestin has made four appearances.
Caretaker-manager John Pemberton said: "They've both been great and they were both very positive in my conversations with them. They're enjoying it here and made it clear they were happy to stay."