tvOS 13.4 (build 17L256) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2020-03-24T17:17:33Z. The update package is 440.65 MB. This is a delta (partial) update that requires 13.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8cffa81b5d174471fac1d8d4b0cc44b9f6e63ad5.zip.