diff --git a/core-java-modules/core-java-concurrency-advanced-4/README.md b/core-java-modules/core-java-concurrency-advanced-4/README.md
index b9881fd475..376c5cc711 100644
--- a/core-java-modules/core-java-concurrency-advanced-4/README.md
+++ b/core-java-modules/core-java-concurrency-advanced-4/README.md
@@ -8,3 +8,4 @@
 - [Acquire a Lock by a Key in Java](https://www.baeldung.com/java-acquire-lock-by-key)
 - [Differences Between set() and lazySet() in Java Atomic Variables](https://www.baeldung.com/java-atomic-set-vs-lazyset)
 - [Volatile vs. Atomic Variables in Java](https://www.baeldung.com/java-volatile-vs-atomic)
+- [What Is “Locked Ownable Synchronizers” in Thread Dump?](https://www.baeldung.com/locked-ownable-synchronizers)