diff --git a/_Sidebar.md b/_Sidebar.md
index 7410a37..e108edb 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -4,6 +4,8 @@
 - Apache Tomcat 9
 
 ### Downloads: [![Total Downloads](https://get-badge.herokuapp.com/ran-jit/tomcat-cluster-redis-session-manager/total)](https://github.com/ran-jit/tomcat-cluster-redis-session-manager/wiki)
+- 4.x
+     - [**4.0**](https://github.com/ran-jit/tomcat-cluster-redis-session-manager/releases/tag/4.0)
 - 3.x
      - [**3.0.5.1**](https://github.com/ran-jit/tomcat-cluster-redis-session-manager/releases/tag/3.0.5.1)
      - [**3.0.5**](https://github.com/ran-jit/tomcat-cluster-redis-session-manager/releases/tag/3.0.5)