diff --git a/libraries-3/README.md b/libraries-3/README.md
index 942f108afd..404045e6b1 100644
--- a/libraries-3/README.md
+++ b/libraries-3/README.md
@@ -11,3 +11,4 @@ Remember, for advanced libraries like [Jackson](/jackson) and [JUnit](/testing-m
 - [Parsing Command-Line Parameters with JCommander](https://www.baeldung.com/jcommander-parsing-command-line-parameters)
 - [Guide to the Cactoos Library](https://www.baeldung.com/java-cactoos)
 - [Parsing Command-Line Parameters with Airline](https://www.baeldung.com/java-airline)
+- [Introduction to cache2k](https://www.baeldung.com/java-cache2k)