Kaspersky Lab has filed a lawsuit against the U.S. government in response to the decision of the Department of Homeland Security (DHS) to ban the use of the company’s products in federal agencies.

The Russia-based cybersecurity firm’s appeal, filed in the U.S. District Court for the District of Columbia, targets the DHS’s Binding Operational Directive 17-01, which the agency issued in mid-September. President Donald Trump reinforced the ban last week when he signed the National Defense Authorization Act for FY2018.