diff --git a/sidebar.md b/sidebar.md
index 8d3579f..1d167e9 100644
--- a/sidebar.md
+++ b/sidebar.md
@@ -17,6 +17,7 @@
 1. [数组的扩展](#docs/array)
 1. [对象的扩展](#docs/object)
 1. [对象的新增方法](#docs/object-methods)
+1. [运算符的扩展](#docs/operator)
 1. [Symbol](#docs/symbol)
 1. [Set 和 Map 数据结构](#docs/set-map)
 1. [Proxy](#docs/proxy)