diff --git a/simpledemo.html b/simpledemo.html
index 610723c..11086fc 100644
--- a/simpledemo.html
+++ b/simpledemo.html
@@ -14,6 +14,12 @@ You should have received a copy of the GNU General Public License along with thi
 <head>
     <meta charset='utf-8'>
     <meta name='viewport' content='width=device-width,initial-scale=1'>
+    <meta http-equiv="Content-Security-Policy" content="
+        default-src 'none'; 
+        style-src 'unsafe-inline' https://cdn.jsdelivr.net; 
+        img-src 'self' http://netspeaker.privacynerd.de https://swetrix.privacynerd.de;
+        script-src 'self';
+    ">
     <title>NetSpeaker Demo (on [IP here])</title>
     <link href='https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css' rel='stylesheet'
           integrity='sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN' crossorigin='anonymous'>
