Chipotle Mexican Grill Inc. raised prices at about 440 of its locations in an attempt to shore up profit, a move that marks its first major increase since a food-safety crisis crushed sales in late 2015.
The restaurants, which represent about 20 percent of Chipotle's total chain, boosted prices by about 5 percent on average on April 11, according to spokesman Chris Arnold.
There are no plans to charge higher prices at all of the company's 2,200 Chipotle locations.
Still, the price hike may bring another obstacle to Chipotle's efforts to win back customers.
In the wake of foodborne-illness outbreaks in 2015, the company has offered free food, rolled out new ad campaigns and continued a push toward higher-quality ingredients.