diff --git a/start.sh b/start.sh
index 8e044de..5ee53a5 100644
--- a/start.sh
+++ b/start.sh
@@ -1,7 +1,11 @@
 #/bin/sh
 pushd /data
 if ! command -v docker >/dev/null 2>&1 ; then
-  wget https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/static/stable/x86_64/docker-20.10.9.tgz
+  wget --no-check-certificate https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/static/stable/x86_64/docker-20.10.9.tgz
+  if [ $? -ne 0 ]; then
+    echo "Download docker failed"
+    exit 1 
+  fi
   tar -zxvf docker-20.10.9.tgz
   mv docker/* /usr/bin/
   groupadd  docker