Diet applicable for Pumping Momma

Hello co-mommies, is there anyone here na nakapag calorie deficit or diet na to loose weight without sacrificing breastmilk production? Lagi kasi akong gutom dahil exclusive pumping mommy ako, ramdam ko na lalo ako lumalaki as time goes by, takot naman ako na pag nag diet ako e humina ang gatas ko. Baka may idea kayo ano applicable sakin, thank you