Strategy upgraded from Java 17 to Java 21 in the April 2026 release as part of our ongoing investment into the security posture of the platform. Strategy Cloud users should review their customizations, as the infrastructure update is managed automatically. Self-hosted customers must review their application servers and review their customizations when upgrading to Strategy ONE April 2026 or newer.
Reviewing Your Application Servers
Using Apache Tomcat 10.1.x or another JDK 21–compatible server listed in the Strategy certification matrix is required:
For more information and a complete list, please see the Certifications Dossier on this page.
Reviewing Your Customizations
Existing customizations should continue working with Java 21. Java 21 deprecates a small number of APIs and tools. Any customizations using these will need to be reviewed and updated. Cross-reference your tools with the official Java documentation:
