diff --git a/_Sidebar.md b/_Sidebar.md
index 26171fc..bf7a60e 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -1,3 +1,5 @@
+### [4.0](https://github.com/vmstan/gravity-sync/wiki/4.0)
+
 ### Installation
 * [Requirements](https://github.com/vmstan/gravity-sync/wiki/System-Requirements)
 * [Preparation](https://github.com/vmstan/gravity-sync/wiki/Installing#primary-pi-hole)