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 186c217656..e2ab509d8e 100644
--- a/core-java-modules/core-java-string-operations-7/README.md
+++ b/core-java-modules/core-java-string-operations-7/README.md
@@ -8,3 +8,4 @@
 - [Difference Between String isEmpty() and isBlank()](https://www.baeldung.com/java-string-isempty-vs-isblank)
 - [String’s Maximum Length in Java](https://www.baeldung.com/java-strings-maximum-length)
 - [Java’s String.length() and String.getBytes().length](https://www.baeldung.com/java-string-length-vs-getbytes-length)
+- [Replace Non-Printable Unicode Characters in Java](https://www.baeldung.com/java-replace-non-printable-unicode-characters)