diff --git a/java-collections-maps-3/README.md b/java-collections-maps-3/README.md
index 4da8547824..39ac8575fa 100644
--- a/java-collections-maps-3/README.md
+++ b/java-collections-maps-3/README.md
@@ -1,3 +1,4 @@
 ### Relevant Articles:
 
 - [Java Map With Case-Insensitive Keys](https://www.baeldung.com/java-map-with-case-insensitive-keys)
+- [Using a Byte Array as Map Key in Java](https://www.baeldung.com/java-map-key-byte-array)