diff --git a/README.md b/README.md
index 89de38a..7729938 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,11 @@ docker-compose up -d
 docker-compose down
 ```
 
+更新镜像
+```
+bash ./bin/update_docker_images.sh
+```
+
 ## 修改端口
 修改conf/config.json
 ```json
diff --git a/bin/print_share_link.sh b/bin/print_share_link.sh
index c8f9e68..db83b16 100644
--- a/bin/print_share_link.sh
+++ b/bin/print_share_link.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # 检查 jq 是否安装
 if ! command -v jq &> /dev/null; then