diff --git a/prepare.sh b/prepare.sh
index 87212b3..f46e6e8 100644
--- a/prepare.sh
+++ b/prepare.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # 默认情况下MT3000和MT2500A的环境是ash
 # 建议安装bash 满足更多的函数调用
 check_bash_installed() {