diff --git a/java-collections-maps-3/README.md b/java-collections-maps-3/README.md
index 75842c85a4..e2e0a56489 100644
--- a/java-collections-maps-3/README.md
+++ b/java-collections-maps-3/README.md
@@ -7,3 +7,4 @@
 - [Update the Value Associated With a Key in a HashMap](https://www.baeldung.com/java-hashmap-update-value-by-key)
 - [Java Map – keySet() vs. entrySet() vs. values() Methods](https://www.baeldung.com/java-map-entries-methods)
 - [Java IdentityHashMap Class and Its Use Cases](https://www.baeldung.com/java-identityhashmap)
+- [How to Invert a Map in Java](https://www.baeldung.com/java-invert-map)