diff --git a/app/controllers/instance_actors_controller.rb b/app/controllers/instance_actors_controller.rb
index 0853897f20..8422d74bc3 100644
--- a/app/controllers/instance_actors_controller.rb
+++ b/app/controllers/instance_actors_controller.rb
@@ -1,10 +1,13 @@
 # frozen_string_literal: true
 
-class InstanceActorsController < ApplicationController
-  include AccountControllerConcern
+class InstanceActorsController < ActivityPub::BaseController
+  vary_by ''
 
-  skip_before_action :check_account_confirmation
-  skip_around_action :set_locale
+  serialization_scope nil
+
+  before_action :set_account
+  skip_before_action :require_functional!
+  skip_before_action :update_user_sign_in
 
   def show
     expires_in 10.minutes, public: true