The clock is winding down on TikTok’s future in the United States, as the popular video-sharing website’s China-based owner, ByteDance, has until this Sunday, Jan. 19, to sell TikTok to a non-Chinese owner or shut it down in the U.S—the day before President-Elect Donald Trump takes office. That’s because Congress recently passed a bipartisan law, called the Protecting Americans from Foreign Adversary Controlled Applications Act (or PAFACA), banning internet service providers and firms from hosting or offering apps controlled by foreign governments hostile to the U.S. The proponents of the Act believe the website gathers user data and that China could manipulate personalized video feeds to influence U.S. public opinion. TikTok is reportedly used by more than 170 million Americans.