diff --git a/app/models/form/admin_settings.rb b/app/models/form/admin_settings.rb
index 2d3aa726d6..85a6e6dffc 100644
--- a/app/models/form/admin_settings.rb
+++ b/app/models/form/admin_settings.rb
@@ -25,6 +25,9 @@ class Form::AdminSettings
     preview_sensitive_media
     custom_css
     profile_directory
+    thumbnail
+    hero
+    mascot
   ).freeze
 
   BOOLEAN_KEYS = %i(