diff --git a/404.html b/404.html
index b73e7ee..c92aa7b 100644
--- a/404.html
+++ b/404.html
@@ -7,6 +7,7 @@
     
     <meta charset="UTF-8">
     <meta http-equiv="X-XSS-Protection" content="1; mode=block">
+    <meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; form-action 'self';">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="robots" content="INDEX, FOLLOW">
     <meta http-equiv="content-type" content="text/html; charset=UTF-8">