diff --git a/pages/_document.tsx b/pages/_document.tsx
index 774e697..584611c 100644
--- a/pages/_document.tsx
+++ b/pages/_document.tsx
@@ -5,7 +5,11 @@ class AppDocument extends Document {
     return (
       <Html lang="en">
         <Head>
-          <link rel="preconnect" href="https://vitals.vercel-insights.com" />
+          <meta
+            httpEquiv="Content-Security-Policy"
+            content="upgrade-insecure-requests"
+          />
+          <link rel="preconnect" href="https://vitals.vercel-insights.com" />\
           <meta name="title" content="albert" />
           <meta name="og:title" content="albert" />
           <meta name="description" content="system administrator" />
