Delta Air Lines updated its policies for emotional support animals, discontinuing its eight-hour flight limit but keeping the ban on pit bulls.

Delta’s changes follow the U.S. Department of Transportation’s release of its guidance for service and support animals. The two entities are hoping to protect the health and safety of passengers and crew members onboard, while also allowing ESAs to fly on longer flights.

“We will never compromise on safety, and we will do what is right for the health and safety of our customers and employees,” said John Laughter, senior vice president, Delta. “We continue to work with the DOT to find solutions that support the rights of customers who have legitimate needs to travel with trained animals.”

The carrier says it’s working to accommodate all approved ESAs, but has not been able to find a solution to allowing pit bulls onboard that satisfies safety requirements. The airline says pit bulls make up less than 5 percent of the dog population, but 37.5 percent of dog attacks.

“The safety of our people is paramount. In 2018 alone, more than 40 instances of aggressive animal behavior occurred aboard a Delta aircraft,” said Allison Ausband, senior vice president, Delta. “Our 25,000 flight attendants are my greatest responsibility, and I will do everything I can to keep them safe and send them home to their families in the same condition they came to work.”