Defender Lamine Kone has agreed to a new contract that will keep him at Sunderland until 2021, the Premier League club have confirmed.
The 27-year-old has agreed to fresh terms that will tie him to the Stadium of Light until 2021.
The news comes as a huge boost to Sunderland, with Kone having been heavily linked with a move away from the club during the transfer window.
"Sunderland AFC defender Lamine Kone has signed a new five-year contract with the Black Cats," a club statement read.
"The deal will see the 27-year-old Ivory Coast international remain on Wearside until 2021.
"Kone joined Sunderland in January after completing a move from French side FC Lorient and has since become an integral part of the Black Cats side, even scoring a brace against Everton last season as Sunderland secured their Premier League status."
Manager David Moyes was delighted to secure Kone's future following speculation linking him with a move to Everton in August.
"Lamine is an important player for this club and I made that clear to him from the outset," he said.
"He has only been playing in the Premier League since January, but in that time we have already seen what he is capable of.
"The challenge for Lamine now is to build on what has been a very positive introduction to English football and to continue to improve and grow as a player."