diff --git a/core-java-concurrency-basic/README.md b/core-java-concurrency-basic/README.md
index 406b635785..f33ae08571 100644
--- a/core-java-concurrency-basic/README.md
+++ b/core-java-concurrency-basic/README.md
@@ -15,5 +15,5 @@
 - [wait and notify() Methods in Java](http://www.baeldung.com/java-wait-notify)
 - [Life Cycle of a Thread in Java](http://www.baeldung.com/java-thread-lifecycle)
 - [Runnable vs. Callable in Java](http://www.baeldung.com/java-runnable-callable)
-- [What is Thread-Safety and How to Achieve it](https://www.baeldung.com/java-thread-safety)
+- [What is Thread-Safety and How to Achieve it?](https://www.baeldung.com/java-thread-safety)
 - [How to Start a Thread in Java](https://www.baeldung.com/java-start-thread)