Jackson Version 2.21 is being developed, as of September 2025.

This wiki page gives a list of links to all changes (with brief descriptions) that will eventually be included, as well as about original plans for bigger changes (and in some cases changes to plans, postponing).

Version is under development (under branch 2.x)

No release yet.

Same as Jackson 2.20, SDK 26

Same as Jackson 2.20; mostly Java 8, with some modules requiring later JDKs:

• jackson-datatype-hibernate: JDK 11 for some modules
• jackson-jakarta-providers: JDK 11

Same as Jackson 2.20?

None

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• #314: Add JsonInclude.Value convenience constants

• #:

• #5045: If there is a no-parameter constructor marked as JsonCreator and a constructor reported as DefaultCreator, latter is incorrectly used
• #5313: Expose getConverter() in StdDelegatingSerializer for improved customizability