South Lakes Safari Zoo where keeper Sarah McClay was killed by a tiger has admitted to health and safety breaches.
An inquest jury in September 2014 ruled the Sumatran tiger passed through two unlocked internal sliding gates within the tiger house before pouncing on Miss McClay.
Although systems, indoor and outdoor compartments connected by lockable self-closing doors, were in place to prevent interaction between keepers and animals, the zoo accepted it had not sufficiently addressed risks arising from a defective bolt on the door that was open immediately before the attack.
The company said "a more proactive maintenance and inspection regime" should have been in place to ensure the door functioned efficiently and that its self-closing mechanism worked properly.
The zoo pleaded guilty to breaches under the Health and Safety at Work etc Act 1974.
Barrow Borough Council, which oversees the zoo, are yet to decide whether to renew the park's operating license. There will be a council hearing on 5 July where David Gill, the zoo's director, must demonstrate that a number of requirements have been met.
