diff --git a/controllers/common.php b/controllers/common.php
index 0384e54..36269a8 100644
--- a/controllers/common.php
+++ b/controllers/common.php
@@ -41,6 +41,7 @@ Router\before(function ($action) {
         'media-src' => '*',
         'img-src' => '* data:',
         'frame-src' => Model\Config\get_iframe_whitelist(),
+        'child-src' => Model\Config\get_iframe_whitelist(),
         'referrer' => 'no-referrer',
     ));