As the U.S. Department of Justice negotiates a settlement of its antitrust lawsuit against Apple, app developers are fretting that any deal won’t go far enough in curbing what they see as Apple’s anticompetitive behavior, according to people familiar with the talks.

Several developers, including PayPal and Epic Games, have discussed their concerns with the Justice Department about a possible settlement of the Apple case, the people said. In communication with developers, Justice Department officials have signaled their preference to settle the lawsuit rather than fight it, the people said.