The app had more than 170 million monthly users in the U.S. The black-out is the result of a law forcing the service offline unless it sheds its ties to ByteDance, its China-based parent company.

In an unsigned decision, the court sided with the government’s arguments that the divest-or-ban law does not violate the First Amendment. In a unanimous ruling, the Supreme Court voted Friday to uphold a law that will require TikTok to shut down as soon as Sunday,

That decision shifts the focus to whether President-elect Donald Trump can intervene after he takes office on Monday.