tvOS 13.4 (build 17L6256) is an official Apple over-the-air update for the Apple TV 4K, released on 2020-03-18T17:19:31Z. The update package is 1.87 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7c59424e5abd566b6df121b15897f6afc2a2df2d.zip.