Gary McCann has strengthened the squad ahead of this weekend's FA Cup tie by adding two players, one of whom was playing in the Scottish Premiership last season.
Defender Ben Frempah joins from Ross County, where he spent last season before his release in the summer. He has also played for Cray Wanderers and Leicester City.
Also signing is midfielder Aryan Tajbakhsh, who joins from Enfield Town having previously appeared for a number of clubs including Potters Bar Town, Maidenhead United and St Albans City.