Mississippians can no longer access the Bluesky app after the social media platform blocked access to users in the state.

Bluesky said on Friday that it made the decision after the U.S. Supreme Court declined for now to block a Mississippi state law that the platform said limits free expression, invades people’s privacy and unfairly targets smaller social media companies. The state law, passed in 2024, requires users of websites and other digital services to verify their age.

“The Supreme Court’s recent decision leaves us facing a hard reality: comply with Mississippi’s age assurance law—and make every Mississippi Bluesky user hand over sensitive personal information and undergo age checks to access the site—or risk massive fines,” the company wrote in a statement. “The law would also require us to identify and track which users are children, unlike our approach in other regions. We think this law creates challenges that go beyond its child safety goals, and creates significant barriers that limit free speech and disproportionately harm smaller platforms and emerging technologies.”

Mississippi Attorney General Lynn Fitch, whose office defended the law, told the justices that age verification could help protect young people from “sexual abuse, trafficking, physical violence, sextortion and more,” activities that the First Amendment does not protect.

The age verification law added Mississippi to a list of Republican-led states where similar legal challenges are playing out.

NetChoice is challenging laws passed in Mississippi and other states that require social media users to verify their ages, and asked the Supreme Court to keep the measure on hold while a lawsuit plays out.

That came after a federal judge prevented the 2024 law from taking effect. But a three-judge panel of the 5th Circuit U.S. Court of Appeals ruled in July that the law could be enforced while the lawsuit proceeds.

On Aug. 14, the Supreme Court rejected an emergency appeal from a tech industry group representing major platforms such as Facebook, X and YouTube.

There were no noted dissents from the brief, unsigned order. Justice Brett Kavanaugh wrote that there’s a good chance NetChoice will eventually succeed in showing that the law is unconstitutional, but hadn’t shown it must be blocked while the lawsuit unfolds.

Bluesky grew after the 2024 presidential election. Many users of X, which is owned by Elon Musk, retreated from the platform in response to the billionaire’s strong support of Donald Trump.

In Bluesky’s statement explaining its decision to block access in Mississippi, the company said age verification systems “require substantial infrastructure and developer time investments, complex privacy protections, and ongoing compliance monitoring — costs that can easily overwhelm smaller providers.”

“This dynamic entrenches existing big tech platforms while stifling the innovation and competition that benefits users,” the company added.

Bluesky said it did follow other digital safety regulations, such as the United Kingdom’s Online Safety Act. Under that statute, age checks are required only for accessing certain content and features, and Bluesky does not track which users are under 18, the platform said:

“Mississippi’s law, by contrast, would block everyone from accessing the site—teens and adults—unless they hand over sensitive information, and once they do, the law in Mississippi requires Bluesky to keep track of which users are children.”

The Mississippi law, authored by Rep. Jill Ford, a Republican from Madison, is called the “Walker Montgomery Protecting Children Online Act,” named after a Mississippi teen who reportedly committed suicide after an overseas online predator threatened to blackmail him.

The Associated Press contributed to this report