diff --git a/core-java-modules/core-java-string-operations-7/README.md b/core-java-modules/core-java-string-operations-7/README.md
index a358c8fa57..7264c3d945 100644
--- a/core-java-modules/core-java-string-operations-7/README.md
+++ b/core-java-modules/core-java-string-operations-7/README.md
@@ -15,3 +15,4 @@
 - [Simple Morse Code Translation in Java](https://www.baeldung.com/java-morse-code-english-translate)
 - [How to Determine if a String Contains Invalid Encoded Characters](https://www.baeldung.com/java-check-string-contains-invalid-encoded-characters)
 - [Regular Expression for Password Validation in Java](https://www.baeldung.com/java-regex-password-validation)
+- [Mask an Email Address and Phone Number in Java](https://www.baeldung.com/java-mask-email-address-phone-number)