Striker Yahya Idrissa has signed a first professional contract with the team.
Idrissa joined Chelsea at the age of 12 and has worked his way up through the club's youth academy to the under-18 team.
Goalkeeper Ted Curd has also signed a new three-year contract with the club.
Curd, an England under-19 international, spent time on loan with Hampton & Richmond Borough earlier this season.
