TikTok said it will have to “go dark” this weekend unless the outgoing Biden administration assures the company it won’t enforce a shutdown of the popular app after the Supreme Court on Friday unanimously upheld the federal law banning the app unless it’s sold by its China-based parent company.

The Supreme Court upheld a law banning TikTok in the US over national security concerns unless its Chinese parent ByteDance sells it. Without immediate assurances from the Biden administration, the app will go dark on January 19.

In TikTok's case it could give Congress time to consider a new bill that would give ByteDance another 270 days to find an American buyer before being shut down.