![[Note]](images/note.png) | Note |
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Upgrading from Spring Security 4.0.x is passive. These instructions are for users who are updating from Spring Security 3.2.x to 4.1.x. |
As exploits against applications evolve, so must Spring Security. As a major release version, the Spring Security team took the opportunity to make some non-passive changes which focus on:
- Ensuring Spring Security is more secure by default
- Minimizing Information Leakage
- Removing deprecated APIs
For complete details on migrating from Spring Security 3 to Spring Security 4 refer to one of the guides below: