The 20-year-old made 26 appearances on loan as former Swansea boss Brendan Rodgers got the best out of the England Under-21 defender.
"I'd never rule out another loan spell at Swansea," he said.
"We had great success last year to finish 11th in the Premier League and it would be stupid to rule out playing for a club of that ambition.
"Swansea helped me massively last year, both as a player and an individual, and I've come a long way since I was first at the club. We made at a mark on the Premier League and it was great to be part of that."