West Ham youngsters Callum Driver and Eoin Wearen have signed new one-year contracts.
Full-back Driver, who joined the Hammers aged 12, had a spell on loan with Burton earlier this season where he made eight appearances and scored one goal.
The 19-year-old told the club's website: "I've worked this whole year to get another contract, so to think the club believe in me and see I have got more development in me is nice."
Centre-back Wearen, also 19, played four games on loan for Dagenham in January.
The Republic of Ireland Under-19 international said: "A lot of good players have been released this year so I know I am one of the lucky ones who have been kept on. I'd like to think I earned this contract."