diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index 612cdb2..29d80bc 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -7,4 +7,5 @@
 {{ with site.Params.plausible_domain }}
 <script defer data-domain="{{ . }}" src="https://plausible.io/js/plausible.js"></script>
 {{ end }}
+Content-Security-Policy: default-src 'self'