diff --git a/spring-security-basic-auth/README.md b/spring-security-basic-auth/README.md
index 37ea545a9b..54d09dbf32 100644
--- a/spring-security-basic-auth/README.md
+++ b/spring-security-basic-auth/README.md
@@ -8,6 +8,7 @@ The "Learn Spring Security" Classes: http://github.learnspringsecurity.com
 ### Relevant Article: 
 - [Spring Security - security none, filters none, access permitAll](http://www.baeldung.com/security-none-filters-none-access-permitAll)
 - [Spring Security Basic Authentication](http://www.baeldung.com/spring-security-basic-authentication)
+- [Writing a Custom Filter in Spring Security](http://www.baeldung.com/spring-security-custom-filter)
 
 
 ### Notes