Spring Boot 3 EOL to Spring Boot 4: A Production Upgrade Playbook (Including Jackson 2 to 3)

· Loiane Groner · April 19, 2026, 2:06 p.m.
Spring framework Spring Boot migration Java software development
Summary
This blog post provides a detailed guide for developers looking to upgrade from Spring Boot 3 to Spring Boot 4. It addresses significant changes including platform baselines, dependency structures, and JSON behavior, emphasizing the importance of a safe migration and assessing end-of-life risks and vulnerabilities.
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