diff --git a/lib/pleroma/web/activity_pub/object_validators/block_validator.ex b/lib/pleroma/web/activity_pub/object_validators/block_validator.ex
index 0de87a27ef..98340545cc 100644
--- a/lib/pleroma/web/activity_pub/object_validators/block_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/block_validator.ex
@@ -29,7 +29,7 @@ def cast_data(data) do
 
   defp validate_data(cng) do
     cng
-    |> validate_required([:id, :type, :actor, :to, :cc, :object])
+    |> validate_required([:id, :type, :actor, :to, :object])
     |> validate_inclusion(:type, ["Block"])
     |> CommonValidations.validate_actor_presence()
     |> CommonValidations.validate_actor_presence(field_name: :object)