diff --git a/config/config.exs b/config/config.exs
index 5cb03e5..dab5d20 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -72,5 +72,11 @@ import_config "#{config_env()}.exs"
 config :plug_content_security_policy,
   nonces_for: [:script_src],
   directives: %{
-    img_src: ~w('self' data data:)
+    img_src: ~w('self' data data:),
+    default_src: ~w('none'),
+    connect_src: ~w('self'),
+    child_src: ~w('self'),
+    img_src: ~w('self'),
+    script_src: ~w('self'),
+    style_src: ~w('self')
   }