diff --git a/includes/class-activity-dispatcher.php b/includes/class-activity-dispatcher.php
index c3946d6..857880f 100644
--- a/includes/class-activity-dispatcher.php
+++ b/includes/class-activity-dispatcher.php
@@ -6,6 +6,7 @@ use WP_Comment;
 use Activitypub\Activity\Activity;
 use Activitypub\Collection\Users;
 use Activitypub\Collection\Followers;
+use Activitypub\Transformer\Factory;
 use Activitypub\Transformer\Post;
 use Activitypub\Transformer\Comment;