tvOS 13.4.5 (build 17L562) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2020-05-20T17:07:48Z. The update package is 435.67 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 016ae46fea43c7144f5d886dbd42b1822651366b.zip.