diff --git a/_config.yml b/_config.yml
index 3f829ca..6cb531c 100644
--- a/_config.yml
+++ b/_config.yml
@@ -32,4 +32,9 @@ defaults:
       path: ""
       type: post
     values:
-      layout: "post"
\ No newline at end of file
+      layout: "post"
+
+webrick:
+  headers:
+    Content-Security-Policy: frame-ancestors 'self'
+    X-Frame-Options: SAMEORIGIN
\ No newline at end of file