The Federal Trade Commission is accusing Deere & Co. of unfairly monopolizing the farm-equipment repair market.

The U.S. Federal Trade Commission on Wednesday sued farm equipment maker Deere, alleging it illegally drives up repair costs by forcing farmers to rely on its authorized dealer network. The lawsuit argues Deere has unlawfully boosted profits by requiring farmers to use its network of authorized dealers for repairs,

John Deere’s “unfair” practices raised repair costs for farmers and kept them from being able to make repairs on tractors and other equipment they own, the Federal Trade Commission (FTC) alleges in a new lawsuit.