The Supreme Court will hear parents’ challenge to a Maryland school policy barring opt-outs from LGBT-themed lessons, citing religious rights concerns.

The Supreme Court took up a dispute on the tensions between LGBT rights and religious rights by agreeing to hear a claim by parents in Maryland who objected to books in elementary school classrooms on gender transition and same-sex relationships.

The U.S. Supreme Court agreed on Friday to hear a bid by religious parents to keep their children out of classes in a Maryland public school district when LGBT storybooks are read, the latest case to come to the justices involving the intersection between religion and LGBT rights.