This is a bugfix release relevant if you're using Windows and want to use AWS SSM Parameter Store for storing your agent token. Please see the v5.0.0 release for full notes on what's new in version 5 of the stack.
Fixed
- Retrieve agent token from parameter store on Windows agents #762 (chrisfowles)
Upgrading
In most cases, you should be able to upgrade in-place older versions of the stack with a CloudFormation stack update using the following template URL:
https://s3.amazonaws.com/buildkite-aws-stack/v5.0.1/aws-stack.yml
If you want to launch a new stack, you can use this link (make sure not to use your production AWS account, create a new one for CI):