Luton Town have handed a one-year contract extension to young left-back Jonathan O'Donnell.
The 19-year-old has yet to make a league appearance since joining from St Albans 16 months ago.
But he made his Hatters debut coming off the bench in November's FA Cup first round win over Corby Town.
"JJ's development over the last year has delighted myself and the coaching staff," boss Gary Brabin told the club's official website.
"We believe he has the necessary attributes to make an excellent left-back."