diff --git a/core-java-modules/core-java-lang-oop-patterns/README.md b/core-java-modules/core-java-lang-oop-patterns/README.md
index ea3309dc0a..ba18c57ab0 100644
--- a/core-java-modules/core-java-lang-oop-patterns/README.md
+++ b/core-java-modules/core-java-lang-oop-patterns/README.md
@@ -9,3 +9,4 @@ This module contains articles about Object-oriented programming (OOP) patterns i
 - [How to Make a Deep Copy of an Object in Java](https://www.baeldung.com/java-deep-copy)
 - [Using an Interface vs. Abstract Class in Java](https://www.baeldung.com/java-interface-vs-abstract-class)
 - [Should We Create an Interface for Only One Implementation?](https://www.baeldung.com/java-interface-single-implementation)
+- [How to Deep Copy an ArrayList in Java](https://www.baeldung.com/java-arraylist-deep-copy)