Tonight, Beyoncé and JAY-Z announced the Greenprint Project, a new contest that allows fans a chance to win a lifetime of Bey and Jay concert tickets if they commit to a vegan diet plan. Find Beyoncé’s Instagram post detailing the sweepstakes below.

Though Bey and Jay recently advocated for veganism in the introduction to Marco Borges’ new cookbook The Greenprint: Plant-Based Diet, Best Body, Better World, the contest welcomes all fans willing to implement at least a partially vegan meal plan into their daily life. For instance, contestants may practice “meatless Mondays” or promise to eat “two plant-based meals a day” to qualify for the competition.

Beyoncé and JAY-Z released their joint album Everything Is Love last year. Read Pitchfork’s Festival Report “Why Beyoncé’s Coachella Performance Was One for the Ages.”