The 22-year-old winger joined Swansea from Chelsea last season and made instant impact at the club.
“I feel that if you have an asset at the club, whether it’s player or manager, then it’s in the best interests of the club to tie them down,” said Swans boss Brendan Rodgers.
“I have spoken to Scott already. Scott’s happy and we have regular communication to know where he is at.
“It’s a situation we will look at as a football club. He’s loving his football and is in a great place for his development. The supporters and people love him here. He loves being here.”
