Chromecast firmware versions & release notes

Last updated February 8th, 2021

Here are the latest firmware versions and release notes for Chromecast devices.

Firmware updates are done in stages, the production firmware versions listed here are updated once that version is available to all devices.

Release notes

Chromecast with Google TV
Build Number: 200918.033
Security Update: December 5, 2020
Published: February 8th, 2021

This software update includes:

  • Improved 4K support for TVs and AVRs
  • Dolby Audio improvements for Dolby Atmos and Dolby Digital Plus passthrough content
  • Android recovery screen improvements and fixes
    • Reduced the occurrence of users seeing the Android recovery screen
    • Improved instructions when the Android recovery screen is shown 
  • Security update: security patch level increased on December 5, 2020
  • General security, stability and performance improvements


Current Preview Program firmware version 

Chromecast (1st gen)  —  Firmware version 1.36.159268​

Chromecast (2nd gen) — Firmware version 1.44.185164

Chromecast — Firmware version 1.44.185164

Chromecast Ultra — Firmware version 1.44.185164

Chromecast Audio — Firmware version 1.42.172094

Want to test drive the latest firmware version before it's released broadly? Join the Chromecast Preview Program. 

Current production firmware version

Chromecast (1st gen)  —  Firmware version 1.36.157768

Chromecast (2nd gen) — Firmware version 1.44.185164

Chromecast — Firmware version 1.44.185164

Chromecast Ultra — Firmware version 1.42.183786

Chromecast Audio — Firmware version 1.42.172094

Cast for Android TV — Firmware version 1.42.179832

How to check your firmware version

To check which firmware version you're on:

  1. Open the Google Home app Google Home app.
  2. Tap your device and then Settings .
  3. Scroll to the bottom and look for Cast firmware version: X.XXX.XXXXX. 
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