Application and Infrastructure configuration is usually an easy place to make catastrophic mistakes. The new Pkl configuration language brings a safer and more maintainable approach to defining and managing configuration. It works with Kubernetes, Spring applications, and really anywhere that you have Yaml or other unstructured configuration. This talk will introduce Pkl and teach you how to use it in your Java applications and infrastructure. If you've written Yaml or used other configuration approaches, this talk will help you understand how Pkl can provide a better foundation for more safe and maintainable configuration.