diff --git a/application/index/controller/admin/System.php b/application/index/controller/admin/System.php
index a7832662..77641de1 100644
--- a/application/index/controller/admin/System.php
+++ b/application/index/controller/admin/System.php
@@ -104,8 +104,10 @@ class System extends Base
             $upgradeFile = app()->getRuntimePath() . 'upgrade.zip';// 判断是否存在安装包
             $file = file_exists($upgradeFile) ? $upgradeFile : $upgrade->download($release->url);
 
+
             // 校验 MD5
             if (md5_file($file) !== $release->md5) {
+                @unlink(app()->getRootPath() . $backup);
                 throw new \Exception('安装包损坏, 请稍后重试');
             }
 
diff --git a/extend/Upgrade.php b/extend/Upgrade.php
index b7b88611..122f51da 100644
--- a/extend/Upgrade.php
+++ b/extend/Upgrade.php
@@ -88,7 +88,7 @@ class Upgrade
         curl_setopt($curl, CURLOPT_TIMEOUT, 180);
         curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 180);
         curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
-        curl_setopt($curl, CURLOPT_HEADER, 1);
+        curl_setopt($curl, CURLOPT_HEADER, 0);
         curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
         curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
         $contents = curl_exec($curl);
diff --git a/public/static/app/js/app.js b/public/static/app/js/app.js
index fd8d8e07..f1cc41a8 100644
--- a/public/static/app/js/app.js
+++ b/public/static/app/js/app.js
@@ -156,7 +156,7 @@ var app = {
       modal: true,
       buttons: [],
       closeOnEsc: false,
-      content: '<div class="mdui-valign"><div class="mdui-spinner mdui-spinner-colorful mr-3"></div> 升级中, 请不要关闭窗口...</div>'
+      content: '<div class="mdui-valign"><div class="mdui-spinner mdui-spinner-colorful mdui-m-r-3"></div> 升级中, 请不要关闭窗口...</div>'
     });
     $d.$dialog.css({'max-width': '300px'});
     mdui.mutation();