diff --git a/_Sidebar.md b/_Sidebar.md
index 0030f25..4e820a6 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -14,6 +14,7 @@
   * [[ClientAdapter]]
     * [[Sync HBase]]
     * [[Sync RDB]]
+    * [[Sync ES]]
 * [[AdminGuide]]
 * [[Performance]]
 * [[DevGuide]]