GrubHub (GRUB), DoorDash, Postmates, and Uber Eats have been targeted by a class-action lawsuit brought by three New York-area consumers who say the companies violated the U.S. antitrust law that requires restaurants to charge the same price to consumers no matter if they are dining in or carrying out food orders.

The suit, filed Monday, alleges that both dine-in and carryout prices were raised to make up for the added app fees, which range from 13.5% to 40% of revenues, imposed by the delivery services.

The lawsuit claims the online food delivery services used their “monopoly power” to impose higher fees that resulted in higher menu prices as a result of the coronavirus pandemic.

The court filing suggests that these apps “offer restaurants a devil’s choice. In exchange for permission to participate in defendants’ meal delivery monopolies, restaurants must charge supra-competitive prices to consumers who do not buy their meals through the delivery apps, ultimately driving those consumers to defendants’ platforms.”

According to the consumers that filed the lawsuit, “Plaintiffs bring this claim for relief on behalf of all Americans who would still [like] to enjoy a nice dinner out with their family before defendants make that impossible.”

The lawsuit is looking for triple damages, including overcharges since April 14, 2016, for dine-in and delivery customers in the U.S. at restaurants using the four companies’ apps.

Shares of GrubHub stock were up 5.14% as of 3:36 p.m. EDT on Tuesday.

Close-up of logo for food delivery service Grubhub in a restaurant setting, October 13, 2019. Getty Images/Smith Collection/Gado