Java Architecture Diary

Dec 29, 2025 · Information Security

Why Spring Authorization Server Merged into Spring Security 7.0 and How to Migrate

Spring Authorization Server has been integrated into Spring Security 7.0, ending its independent lifecycle; the article explains the three historical eras, the reasons for the merge, and provides concrete dependency and configuration changes—including Lambda DSL updates—to help developers migrate from SpringBoot3 to SpringBoot4 with minimal effort.