Defenders Luke Foster and James Clarke have signed new deals with the club.
Clarke put pen to paper on his first professional contract after United's match against Tonbridge on Saturday, agreeing a two-and-a-half-year deal.
Foster, who has been in fine form at centre back alongside Barry Quinn since Darren Patterson took over as manager, agreed a one-year extension to his current deal.
Patterson said: "I'm pleased that they have committed themselves to the club."
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