diff --git a/core-java-modules/core-java-security-4/README.md b/core-java-modules/core-java-security-4/README.md
index e850841d2b..edb29167ef 100644
--- a/core-java-modules/core-java-security-4/README.md
+++ b/core-java-modules/core-java-security-4/README.md
@@ -3,5 +3,5 @@
 This module contains articles about core Java Security
 
 ### Relevant Articles:
-
+- [Check if Certificate Is Self-Signed or CA-Signed With Java](https://www.baeldung.com/java-check-certificate-sign)
 - More articles: [[<-- prev]](/core-java-modules/core-java-security-3)