Barnet have extended Alassane N'Diaye's contract and the loan spell of West Brom defender Paul Downing.
Midfielder N'Diaye, 21, has made two appearances since joining on a short-term deal in November and will now stay until the end of the season.
The former Crystal Palace player told the club website: "I hope to get a few more games in."
Downing, 20, has made 13 appearances since his November switch and will now stay until 28 February.
He said: "It's been really good coming in here and we now have some big games coming up, maybe even a Wembley final in the Johnstone's Paint Trophy."