diff --git a/index.html b/index.html
index 1091254..85f5879 100644
--- a/index.html
+++ b/index.html
@@ -5,6 +5,7 @@
     <!-- 基础信息 -->
     <meta charset="utf-8">
     <meta http-equiv="Access-Control-Allow-Origin" content="*">
+    <meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
     <meta name="renderer" content="webkit" />
     <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
     <meta name="force-rendering" content="webkit" />