diff --git a/app/controllers/api/v1/webhooks/social_inbox_controller.rb b/app/controllers/api/v1/webhooks/social_inbox_controller.rb
index 76c7ec40..20028708 100644
--- a/app/controllers/api/v1/webhooks/social_inbox_controller.rb
+++ b/app/controllers/api/v1/webhooks/social_inbox_controller.rb
@@ -47,6 +47,10 @@ module Api
         # Cuando rechazamos una actividad, recibimos la confirmación y
         # cambiamos el estado
         def onrejected
+          ActivityPub.transaction do
+            activity_pub.reject! if activity_pub.waiting?
+          end
+
           head :accepted
         end
 
diff --git a/app/models/activity_pub.rb b/app/models/activity_pub.rb
index 71d67722..b8e8eded 100644
--- a/app/models/activity_pub.rb
+++ b/app/models/activity_pub.rb
@@ -53,5 +53,10 @@ class ActivityPub < ApplicationRecord
     event :approve do
       transitions from: :waiting, to: :approved
     end
+
+    # La actividad fue rechazada
+    event :reject do
+      transitions from: :waiting, to: :rejected
+    end
   end
 end