diff --git a/bundles/hedgedoc/metadata.py b/bundles/hedgedoc/metadata.py
index 3ad4246..89715aa 100644
--- a/bundles/hedgedoc/metadata.py
+++ b/bundles/hedgedoc/metadata.py
@@ -14,10 +14,13 @@ defaults = {
                 'csp': {
                     'enable': True,
                     'directives': {},
-                    'upgradeInsecureRequests': 'auto',
                     'addDefaults': True,
                     'addDisqus': False,
-                    'addGoogleAnalytics': False
+                    'addGoogleAnalytics': False,
+                    'upgradeInsecureRequests': 'auto',
+                    'reportURI': 'undefined',
+                    'allowFraming': False,
+                    'allowPDFEmbed': False,
                 },
                 'cookiePolicy': 'lax',
                 'db': {