The Supreme Court upheld a law today that could ban the wildly popular social media app TikTok in the U.S. starting on Sunday, unless its Chinese owner agrees to sell it before then. The justices unanimously rejected TikTok’s First Amendment challenge and argued that Congress was entitled to effectively outlaw the app for national security reasons.

In an unsigned opinion, the Court sided with the national security concerns about TikTok rather than the First Amendment rights. There were no noted dissents.