diff --git a/core-java-modules/core-java-15/README.md b/core-java-modules/core-java-15/README.md
index de503fbb31..4b163fcfb5 100644
--- a/core-java-modules/core-java-15/README.md
+++ b/core-java-modules/core-java-15/README.md
@@ -4,4 +4,5 @@ This module contains articles about Java 15.
 
 ### Relevant articles
 
+- [Hidden Classes in Java 15](https://www.baeldung.com/java-hidden-classes)
 - [Sealed Classes and Interfaces in Java 15](https://www.baeldung.com/java-sealed-classes-interfaces)