diff --git a/README.md b/README.md
index f28fc73..f1a0633 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,6 @@
+> [!CAUTION]
+> This project is no longer maintained.
+
 # Jenkins
 
 This is a Node.js client for [Jenkins](http://jenkins-ci.org/).