diff --git a/core-java-modules/core-java-string-operations-4/README.md b/core-java-modules/core-java-string-operations-4/README.md
index 0e6c9e7e2c..ff6d887154 100644
--- a/core-java-modules/core-java-string-operations-4/README.md
+++ b/core-java-modules/core-java-string-operations-4/README.md
@@ -6,4 +6,5 @@
 - [Split a String Every n Characters in Java](https://www.baeldung.com/java-string-split-every-n-characters)
 - [String equals() Vs contentEquals() in Java](https://www.baeldung.com/java-string-equals-vs-contentequals)
 - [Check if a String Ends with a Certain Pattern in Java](https://www.baeldung.com/java-string-ends-pattern)
+- [Check if a Character is a Vowel in Java](https://www.baeldung.com/java-check-character-vowel)