The Supreme Court ruled Friday that a controversial ban on TikTok may take effect this weekend, rejecting an appeal from the popular app’s owners that claimed the ban violated the First Amendment.

The Supreme Court has unanimously upheld the federal law banning TikTok beginning Sunday unless it’s sold by its China-based parent company.

The company argued that the law, citing potential Chinese threats to the nation’s security, violated its First Amendment rights and those of its 170 million users.