diff --git a/lib/nulla/models/actor.ex b/lib/nulla/models/actor.ex
index f1c58a1..d77fcb0 100644
--- a/lib/nulla/models/actor.ex
+++ b/lib/nulla/models/actor.ex
@@ -29,8 +29,8 @@ defmodule Nulla.Models.Actor do
     field :tag, {:array, :map}, default: []
     field :attachment, {:array, :map}, default: []
     field :endpoints, :map
-    field :icon, :map, default: %{}
-    field :image, :map, default: %{}
+    field :icon, :map
+    field :image, :map
     field :vcard_bday, :date
     field :vcard_Address, :string
 
diff --git a/priv/repo/migrations/20250615130714_create_actors.exs b/priv/repo/migrations/20250615130714_create_actors.exs
index da2ff37..8098ce9 100644
--- a/priv/repo/migrations/20250615130714_create_actors.exs
+++ b/priv/repo/migrations/20250615130714_create_actors.exs
@@ -26,8 +26,8 @@ defmodule Nulla.Repo.Migrations.CreateActors do
       add :tag, {:array, :map}, default: []
       add :attachment, {:array, :map}, default: []
       add :endpoints, :map
-      add :icon, :map, default: %{}
-      add :image, :map, default: %{}
+      add :icon, :map
+      add :image, :map
       add :vcard_bday, :date
       add :vcard_Address, :string
     end