Former UFC fighter Melvin Guillard’s next World Series of Fighting appearance will be for the lightweight title.

WSOF president Ray Sefo confirmed on a recent episode of “Inside MMA” that Guillard will challenge Justin Gaethje later this year. Both fighters are coming off wins earlier this month.

Gaethje (12-0) scored a finish of Nick Newell in the main event, while Guillard (32-13-2) stopped Gesias Cavalcante. “The Young Assassin” did miss weight for the fight.