--- lib/pleroma/object/fetcher.ex
+++ lib/pleroma/object/fetcher.ex
@@ -3,7 +3,10 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Object.Fetcher do
+  @behaviour HTTPSignatures.Adapter
+
   alias Pleroma.HTTP
+  alias Pleroma.Keys
   alias Pleroma.Maps
   alias Pleroma.Object
   alias Pleroma.Object.Containment