Plaintiffs’ attorneys suing over data breaches scored a big win Friday after a federal appeals court reinstated lawsuits brought on behalf of victims of data breaches that hit the U.S. Office of Personnel Management.

The U.S. Court of Appeals for the D.C. Circuit found that the plaintiffs in two consolidated cases had standing to sue in federal court under Article III of the U.S. Constitution. The ruling reversed a district judge’s 2017 dismissal of both cases, one of which was a class action, against the OPM and its contractor, KeyPoint Government Solutions Inc.