Next level Kotlin support in Spring Boot 4

Engineering | Sébastien Deleuze | December 18, 2025 | ...

Following the announcement of the strategic partnership between JetBrains and Spring in May, I would like to share a global update on various Kotlin-related features and documentation enhancements we have made recently, with the goal of making Spring Boot 4 the best framework to develop backend applications with Kotlin.

Kotlin 2 baseline

Kotlin 2.0 introduced a new stable K2 compiler that compiles projects faster, performs smarter code analysis and allows the Kotlin team to evolve the language faster than with the K1 compiler. We recommend IntelliJ IDEA users to upgrade to 2025.3 to benefit…

Spring Boot 3.4.13 available now

Releases | Stéphane Nicoll | December 18, 2025 | ...

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 3.4.13 has been released and is now available from Maven Central.

This release includes 37 bug fixes, documentation improvements, and dependency upgrades. Thanks to all those who have contributed with issue reports and pull requests.

End of open source support for Spring Boot 3.4.x

Spring Boot 3.4.13 marks the end of open source support for Spring Boot 3.4.x. Please upgrade to Spring Boot 3.5.x or 4.0.x as soon as possible. If you are not yet ready to upgrade, commercial support for Spring Boot 3.4.x is available

Spring Boot 4.0.1 available now

Releases | Andy Wilkinson | December 18, 2025 | ...

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 4.0.1 has been released and is now available from Maven Central.

This release includes 88 bug fixes, documentation improvements, and dependency upgrades. Thanks to all those who have contributed with issue reports and pull requests.

How can you help?

If you're interested in helping out, check out the "ideal for contribution" tag in the issue repository. If you have general questions, please ask on stackoverflow.com using the spring-boot tag.

Project Page | GitHub | Issues | Documentation | Stack…

Spring Boot 3.5.9 available now

Releases | Stéphane Nicoll | December 18, 2025 | ...

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 3.5.9 has been released and is now available from Maven Central.

This release includes 43 bug fixes, documentation improvements, and dependency upgrades. Thanks to all those who have contributed with issue reports and pull requests.

How can you help?

If you're interested in helping out, check out the "ideal for contribution" tag in the issue repository. If you have general questions, please ask on stackoverflow.com using the spring-boot tag.

Project Page | GitHub | Issues | Documentation | Stack…

Spring Cloud 2025.0.1 (aka Northfields) Has Been Released

Releases | Ryan Baxter | December 17, 2025 | ...

On behalf of the community, I am pleased to announce that the General Availability (RELEASE) of the Spring Cloud 2025.0.1 Release Train is available today. The release can be found in Maven Central. You can check out the 2025.0.1 release notes for more information.

Notable Changes in the 2025.0.1 Release Train

This release is based on Spring Boot 3.5.8.

For a complete list of changes in this release, see this GitHub project.

The module spring-cloud-starter-parent has been deprecated and will be removed in the next major release.

Spring Cloud Kubernetes

  • Upgrade kubernetes java client to 19.0.3 (#1926)
  • Add the ability to disable leader info contributor (#2086)

This Week in Spring – December 16th, 2025

Engineering | Josh Long | December 16, 2025 | ...

Hi, Spring fans! Welcome to another installment of This Week in Spring! And what a week it’s been! We’ve got around nine shopping days ’til Christmas, and the New Year is almost here! Things are moving so quickly and the Spring community is no exception! Let's dive into this week's wonderful roundup!

Spring for GraphQL 1.3.7, 1.4.4 and 2.0.1 released

Releases | Brian Clozel | December 16, 2025 | ...

I am pleased to announce that the December Spring for GraphQL maintenance releases are now available on Maven Central.

Spring for GraphQL 1.3.7 ships a single dependency upgrade and will be shipped this week with Spring Boot 3.4.13. Spring for GraphQL 1.4.4 ships 6 fixes and upgrades and will be shipped this week with Spring Boot 3.5.9. Spring for GraphQL 2.0.1 ships 9 fixes and upgrades and will be shipped this week with Spring Boot 4.0.1.

As always, you can check the official Spring release calendar for upcoming releases.

How can you help?

If you have general questions, please ask on stackoverflow.com using the spring-graphql tag

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