diff --git a/content/_headers b/content/_headers
index 5a25857..5b61d2e 100644
--- a/content/_headers
+++ b/content/_headers
@@ -3,4 +3,4 @@ https://kempkens.io/*
   X-XSS-Protection: 1; mode=block
   X-Content-Type-Options: nosniff
   Referrer-Policy: no-referrer
-  Content-Security-Policy: default-src 'none'; script-src 'self'; img-src 'self'; style-src 'self' 'unsafe-inline' https://cdnjs.cloudflare.com; font-src 'self'; form-action 'none'; frame-ancestors 'none'; base-uri 'self'
+  Content-Security-Policy: default-src 'none'; manifest-src https://kempkens.io; script-src 'self'; img-src 'self'; style-src 'self' 'unsafe-inline' https://cdnjs.cloudflare.com; font-src 'self'; form-action 'none'; frame-ancestors 'none'; base-uri 'self'