He spent last season with Hibs on-loan.
“4 years ago I signed for Liverpool FC, now It's time to say goodbye," he wrote via Instagram.
“I want to say thank you for the people who supported me, gave me the chance to play for this huge club and who helped me get through hard times.
“I will always feel privileged that I belonged to Liverpool FC, trained and played with such fantastic players.
“I'm sure the club will be successful for a long time coming, because the people working for them are simply amazing. I would like to wish YOU the very best for the future!"