Jakarta EE 9 changed its package namespace from javax.* to jakarta.*. It has significant repercussions across the entire Java ecosystem, including Spring. Spring Framework 6 and Spring Boot 3, which are supported by Tomcat 10 and Jetty 11, adopt Jakarta EE 9 APIs. This session is aimed to guide Spring developers through this transition seamlessly. A live coding demonstration using a Spring application on Open Liberty will dive into the steps involved and highlight areas requiring special attention.