diff --git a/core-groovy/README.md b/core-groovy/README.md
index f1a1161875..fde7f33f86 100644
--- a/core-groovy/README.md
+++ b/core-groovy/README.md
@@ -5,3 +5,4 @@
 - [JDBC with Groovy](http://www.baeldung.com/jdbc-groovy)
 - [Working with JSON in Groovy](http://www.baeldung.com/groovy-json)
 - [Reading a File in Groovy](https://www.baeldung.com/groovy-file-read)
+- [Types of Strings in Groovy](https://www.baeldung.com/groovy-strings)