General Motors’ Cruise autonomous vehicle unit is recalling nearly 1,000 of its driverless cars following a pedestrian crash in San Francisco last month.

Cruise on Wednesday announced it recalled 950 of its cars to update their software after one of the vehicles hit a pedestrian and dragged them to the side of a road in San Francisco on Oct. 2.

In the Oct. 2 crash, a car operated by a human was driving next to a Cruise vehicle when it collided with a pedestrian, pushing the person across their vehicle and onto the ground in the path of the Cruise car, the company said in documents filed with the U.S. National Highway Traffic Safety Administration (NHTSA).