A federal appeals court panel on Friday unanimously upheld a law that could lead to a ban on TikTok as soon as next month, handing a resounding defeat to the popular social media platform as it fights for its survival in the U.S.

The U.S. Court of Appeals for the District of Columbia Circuit denied TikTok’s petition to overturn the law — which requires TikTok to break ties with its China-based parent company ByteDance or be banned by mid-January — and rebuffed the company’s challenge of the statute, which it argued had ran afoul of the First Amendment.

“The First Amendment exists to protect free speech in the United States,” said the court’s opinion, which was written by Judge Douglas Ginsburg. “Here the Government acted solely to protect that freedom from a foreign adversary nation and to limit that adversary’s ability to gather data on people in the United States.”

TikTok and ByteDance — another plaintiff in the lawsuit — are expected to appeal to the Supreme Court, though its unclear whether the court will take up the case.

“The Supreme Court has an established historical record of protecting Americans’ right to free speech, and we expect they will do just that on this important constitutional issue,” TikTok spokesperson Michael Hughes said in a statement.