diff --git a/_layouts/default.html b/_layouts/default.html
index cc5b498..5140a25 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -8,6 +8,7 @@
     <meta name="description" content="">
     <meta name="author" content="">
     <link rel="icon" href="{{ site.url }}favicon.ico">
+    <meta http-equiv="Content-Security-Policy" content="frame-src youtube.com www.youtube.com">
 
     <title>{{ page.title }}</title>