The Department of Justice on Thursday filed a brief on behalf of baker Jack Phillips, who was found to have violated the Colorado Anti-Discrimination Act by refusing to created a cake to celebrate the marriage of Charlie Craig and David Mullins in 2012. Phillips said he doesn’t create wedding cakes for same-sex couples because it would violate his religious beliefs.

The government agreed with Phillips that his cakes are a form of expression, and he cannot be compelled to use his talents for something in which he does not believe.

“Forcing Phillips to create expression for and participate in a ceremony that violates his sincerely held religious beliefs invades his First Amendment rights,” Acting Solicitor General Jeffrey B. Wall wrote in the brief.