CircleCI regularly publishes new images and deprecates older ones used for execution environments. As part of the deprecation process, we run brownouts—short time windows where a soon-to-be retired image is temporarily unavailable. Brownouts help notify users that the image is reaching end-of-life and needs to be upgraded.
To give organizations more control, we’ve added a setting in the CircleCI web app: Organization Settings → Advanced → Enable image brownouts
On (default): Brownouts apply as usual.
Off: Brownouts are disabled for your organization, allowing continued use of the image until it is fully retired.
Note: Changes to this toggle may take up to 10 minutes to take effect. Only organization admins can change this setting.