The 34-year-old Spaniard’s contract at Anfield would have expired at the end of this month.
Adrian joined Liverpool as a free agent in the summer of 2019 after leaving West Ham United and has made 24 appearances in all competitions in his time at the club.
He proved to be Liverpool’s hero in the 2019 UEFA Super Cup against Chelsea, saving Tammy Abraham’s effort in the penalty shoot-out to hand the Reds the trophy.
Adrian has also won the Premier League and FIFA Club World Cup with Jurgen Klopp’s side but continues to play second fiddle to Alisson Becker.
Speaking to Liverpool’s official website after signing his new deal, Adrian said: “I’m delighted, I’m very happy to stay in the club.
“Firstly, because it’s a reward from the club for the hard work that I’ve been doing since I signed two years ago. I really appreciate that confidence from the club, from the manager and from everyone involved in that situation.
“And secondly, and above all of that, it’s a pleasure to stay in Liverpool – it’s such a big club. But being as well a family club, it’s very special for any player to stay here. I am privileged.”
He added: “I try to help the team in every moment. To try to enjoy and give my experience in every second, to the player who plays in that moment or when I play, to try to be together at the same time.
“As Jurgen [Klopp] said, I’m a team player – I try to support, to give that confidence to those players, to try to give that confidence in the dressing room, in the training ground every day. To push each other.
“Because when you are giving your best, the other one is giving their best for sure and you’re pushing each other. At the end, it’s good for the club, for the group, for the manager as well to take the right decision in the moment for the game.
“I’m happy to do that job and also to try to have my opportunity as well and give the best when I have the chance.”
