diff --git a/src/data/roadmaps/spring-boot/content/101-spring-security/index.md b/src/data/roadmaps/spring-boot/content/101-spring-security/index.md
index ef7498e9c..3a7ee81da 100644
--- a/src/data/roadmaps/spring-boot/content/101-spring-security/index.md
+++ b/src/data/roadmaps/spring-boot/content/101-spring-security/index.md
@@ -7,3 +7,4 @@ Visit the following links for more resources:
 - [Spring Security](https://spring.io/projects/spring-security)
 - [Spring Security Introduction](https://www.javatpoint.com/spring-security-introduction)
 - [What is Spring security](https://www.javadevjournal.com/spring/what-is-spring-security/)
+- [Spring Security: Authentication and Authorization In-Depth](https://www.marcobehler.com/guides/spring-security)
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