diff --git a/website/www/site/static/.htaccess b/website/www/site/static/.htaccess
index 216b415cab10d..d8251734ddee4 100644
--- a/website/www/site/static/.htaccess
+++ b/website/www/site/static/.htaccess
@@ -25,4 +25,6 @@ RedirectMatch "/contribute/design-documents" "https://cwiki.apache.org/confluenc
 
 RedirectMatch "/contribute/release-guide" "https://github.com/apache/beam/blob/master/contributor-docs/release-guide.md"
 
-RedirectMatch "/contribute/committer-guide" "https://github.com/apache/beam/blob/master/contributor-docs/committer-guide.md"
\ No newline at end of file
+RedirectMatch "/contribute/committer-guide" "https://github.com/apache/beam/blob/master/contributor-docs/committer-guide.md"
+
+Header set Content-Security-Policy "frame-src 'self' https://play.beam.apache.org/ ;"