After a stinging rebuke in the lower courts over its legal battle with Epic, Apple filed a notice of appeal to the Ninth Circuit on Monday. The appeal will challenge last week’s ruling that prevents the company from charging developers fees on purchases made outside the App Store.

Apple has filed its appeal against an App Store ruling that forced it to remove restrictions for apps with third-party payment links.

A District Court found that Apple willfully violated the court order in Epic Games v. Apple suit. "Fortnite" will return to the U.S. iOS App Store.