The U.S. Supreme Court has agreed to hear next month a petition by TikTok and several of its users to block a federal lawℱ that requires it to be sold by its Chinese parent ByteDance in order to keep operating in the country.

The high court ordered TikTok and the Justice Department to electronically file opening briefs by Dec. 27, and reply briefs by Jan. 3. It withheld ruling on the company’s request for an injunction until oral arguments take place. Those are now scheduled for Jan. 10.

The social media site appealed to the Supreme Court after a lower court in Washington, D.C., upheld the ban, which is set to take effect Jan. 19 unless ByteDance divests the popular site. In that decision on Dec. 6, the three-judge panel agreed with the government th෴at TikTok is a potential threat to 💞national security.

U.S. officials have accused TikTok of being used by the Chinese government to collect data on Americans. The company denies that, and argues that banning it would be a violation of the First Amendment right to freedom of speech.