diff --git a/LICENSE.html b/LICENSE.html
index 033648e..7bbd64e 100755
--- a/LICENSE.html
+++ b/LICENSE.html
@@ -1,70 +1,14 @@
 <!DOCTYPE HTML>
-<html>
+<html lang="en">
   <head>
+    <meta charset="utf-8">
     <title>GNU AFFERO GENERAL PUBLIC LICENSE</title>
-    <meta content="">
-    <style>
-
-    html {
-      font-family: ubuntu, sans-serif;
-      margin-left: 20%;
-      margin-right: 20%;
-      font-size: 22px;
-      background-color: #2a2a2a;
-      color: white;
-      line-height: 30px;
-      text-align: justify;
-
-    }
-
-    ::selection {
-      color: #2a2a2a;
-      background-color: white;
-    }
-
-    h1 {
-      line-height: 45px;
-    }
-
-    a[href] {
-      color: white;
-      transition: color 0.1s;
-    }
-    a[href]:hover {
-      color: red;
-    }
-
-    @font-face {
-      font-family: "ubuntu";
-      src: url('bibli/ubuntu/Ubuntu-R.ttf');
-    }
-
-    @media (max-width: 500px) {
-      html {
-        margin-left: 8px;
-        margin-right: 8px;
-      }
-    }
-
-    @media (max-width: 800px) and (min-width: 501px) {
-      html {
-        margin-left: 10%;
-        margin-right: 10%;
-      }
-    }
-
-    @media (max-width: 1500px) and (min-width: 801px) {
-      html {
-        margin-left: 15%;
-        margin-right: 15%;
-      }
-    }
-
-    </style>
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="referrer" content="no-referrer">
   </head>
   <body>
-    <h1 style="text-align: center;">GNU AFFERO GENERAL PUBLIC LICENSE</h1>
-    <p style="text-align: center;">Version 3, 19 November 2007</p>
+    <h1>GNU AFFERO GENERAL PUBLIC LICENSE</h1>
+    <p>Version 3, 19 November 2007</p>
 
     <p>Copyright &copy; 2007 Free Software Foundation,
     Inc. &lt;<a href="https://fsf.org/">https://fsf.org/</a>&gt;
diff --git a/index.php b/index.php
index a210285..53fe1ef 100755
--- a/index.php
+++ b/index.php
@@ -62,10 +62,14 @@ if (
 <!DOCTYPE html>
 <html lang="<?= $locale ?>">
   <head>
-    <meta charset="UTF-8">
+    <meta charset="utf-8">
     <title>LibreQR · <?= $loc['subtitle'] ?></title>
     <meta name="description" content="<?= $loc['description'] ?>">
     <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="color-scheme" content="dark light">
+    <meta name="application-name" content="LibreQR">
+    <meta name="referrer" content="no-referrer">
+    <meta http-equiv="Content-Security-Policy" content="default-src 'none'; img-src 'self' data:; style-src 'self'; form-action 'self';">
     <link rel="manifest" href="manifest.php">
     <link rel="search" type="application/opensearchdescription+xml" title="LibreQR" href="opensearch.php&#63;redondancy=<?= $params['redondancy'] ?>&amp;margin=<?= $params['margin'] ?>&amp;size=<?= $params['size'] ?>&amp;bgColor=<?= urlencode($params['bgColor']) ?>&amp;mainColor=<?= urlencode($params['mainColor']) ?>">
     <?php
