Dailly returned to action for Scotland against Moldova last week

Dailly, who missed most of last season with a knee injury, told the club's website: "Winning promotion makes signing a new contract more special.

"But I always said that I'd play for West Ham in any division, and now I'm just looking forward to getting into pre-season and starting injury-free.

"West Ham is a Premiership club and it's great to be back there again."