diff --git a/1.sh b/1.sh
index 6f6c85b..3c7b513 100644
--- a/1.sh
+++ b/1.sh
@@ -21,11 +21,12 @@ if [ -f /etc/debian_version ]; then
   chsh -s $(which bash)
   print_green "已将 bash 设置为默认 shell"
 elif [ -f /etc/alpine-release ]; then
-  apk add shadow
+  apk add --no-cache shadow
   chsh -s $(which bash) root
   # sed -i 's|^\(root:.*\):[^:]*$|\1:/bin/bash|' /etc/passwd
   # sed -i 's|^\(root:[^:]*:[^:]*:[^:]*:[^:]*:[^:]*\):[^:]*$|\1:/bin/bash|' /etc/passwd
   print_yellow "已将 bash 设置为默认 shell"
+  apk del shadow
 fi
 
 # 先检查是 Debian 还是 Alpine