diff --git a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
index ffdb16976..dba18a3d0 100644
--- a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
@@ -11,6 +11,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
 
   @primary_key false
   embedded_schema do
+    field(:id, :string)
     field(:type, :string)
     field(:mediaType, :string, default: "application/octet-stream")
     field(:name, :string)
@@ -43,7 +44,7 @@ def changeset(struct, data) do
       |> fix_url()
 
     struct
-    |> cast(data, [:type, :mediaType, :name, :blurhash])
+    |> cast(data, [:id, :type, :mediaType, :name, :blurhash])
     |> cast_embed(:url, with: &url_changeset/2, required: true)
     |> validate_inclusion(:type, ~w[Link Document Audio Image Video])
     |> validate_required([:type, :mediaType])
diff --git a/lib/pleroma/web/activity_pub/object_validators/common_fields.ex b/lib/pleroma/web/activity_pub/object_validators/common_fields.ex
index 49aba68af..db28c38ef 100644
--- a/lib/pleroma/web/activity_pub/object_validators/common_fields.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/common_fields.ex
@@ -33,6 +33,7 @@ defmacro object_fields do
       field(:content, :string)
 
       field(:published, ObjectValidators.DateTime)
+      field(:updated, ObjectValidators.DateTime)
       field(:emoji, ObjectValidators.Emoji, default: %{})
       embeds_many(:attachment, AttachmentValidator)
     end