Chromecast firmware versions & release notes

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: 210311.008 7350836
Security Update: June 8, 2021
Published: June 10, 2021

This software update includes:

• Support for Stadia
• Additional improvements to Bluetooth latency, allowing for better performance for both Bluetooth speakers and headphones.
• Updates and bug fixes to help maintain advanced video settings after device reboots rather than reverting back to factory settings. 
• Updates and improvements to HDMI-CEC issues to improve video quality and reliability. 
• Additional bug fixes and performance improvements.

Previous release notes

Chromecast with Google TV
Build Number: 210311.005
Security Update: April 5, 2021
Published: April 20th, 2021

This software update includes:

• Advanced Video Controls setting for granular HDR formats, resolution/refresh rate, and color formats
  • Advanced Video Controls can be adjusted via Settings  Display & Sound.
• HDMI hotplug improvements to better detect TVs capabilities
• Wi-Fi improvements for 5Ghz and Mesh networks
• Bluetooth Audio stuttering improvements
• HDMI-CEC can now be configured to turn on/off only the TV in settings
• Security update: Android security patch level to April 2021
• Chromecast Remote firmware update to 24.7
• Additional bug fixes and performance improvements

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 1.49.250946

Chromecast — Firmware version 1.49.250946

Chromecast Ultra — Firmware version 1.50.250947

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 1.49.250946

Chromecast — Firmware version 1.49.250946

Chromecast Ultra — Firmware version 1.50.250947

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 .
2. Tap your device  Settings .
3. Scroll to the bottom and look for Cast firmware version: X.XXX.XXXXX.