Muntari, who is currently competing with Ghana at the FIFA World Cup™, joined the Rossoneri in 2012 from Inter Milan. Since then he has scored 11 goals in 66 appearances for the club.
The African star was linked with a return to England this summer with West Ham and Hull among the clubs reportedly leading the chase to sign the talented midfielder. Muntari, who scored five goals in 26 league appearances for Milan in the 2013-14 campaign, played at Portsmouth and Sunderland earlier in his career.
Milan finished eighth in Serie A and failed to qualify for European football for the first time since 1998.