diff --git a/core-java-modules/core-java-collections-maps-6/README.md b/core-java-modules/core-java-collections-maps-6/README.md
index 12a946f8bf..bebcdea82b 100644
--- a/core-java-modules/core-java-collections-maps-6/README.md
+++ b/core-java-modules/core-java-collections-maps-6/README.md
@@ -7,3 +7,4 @@
 - [Converting JsonNode Object to Map](https://www.baeldung.com/jackson-jsonnode-map)
 - [How to Modify a Key in a HashMap?](https://www.baeldung.com/java-hashmap-modify-key)
 - [Converting String or String Array to Map in Java](https://www.baeldung.com/java-convert-string-to-map)
+- [Remove Duplicate Values From HashMap in Java](https://www.baeldung.com/java-hashmap-delete-duplicates)