diff --git a/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex b/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex
index a6119e627..16973e5db 100644
--- a/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex
@@ -49,8 +49,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator do
     field(:inReplyTo, ObjectValidators.ObjectID)
     field(:url, ObjectValidators.Uri)
 
-    field(:likes, {:array, :string}, default: [])
-    field(:announcements, {:array, :string}, default: [])
+    field(:likes, {:array, ObjectValidators.ObjectID}, default: [])
+    field(:announcements, {:array, ObjectValidators.ObjectID}, default: [])
   end
 
   def cast_and_apply(data) do
diff --git a/lib/pleroma/web/activity_pub/object_validators/note_validator.ex b/lib/pleroma/web/activity_pub/object_validators/note_validator.ex
index ab4469a59..e47cbaaea 100644
--- a/lib/pleroma/web/activity_pub/object_validators/note_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/note_validator.ex
@@ -43,8 +43,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.NoteValidator do
     field(:inReplyTo, ObjectValidators.ObjectID)
     field(:url, ObjectValidators.Uri)
 
-    field(:likes, {:array, :string}, default: [])
-    field(:announcements, {:array, :string}, default: [])
+    field(:likes, {:array, ObjectValidators.ObjectID}, default: [])
+    field(:announcements, {:array, ObjectValidators.ObjectID}, default: [])
   end
 
   def cast_and_validate(data) do
diff --git a/lib/pleroma/web/activity_pub/object_validators/question_validator.ex b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
index 934d3c1ea..9310485dc 100644
--- a/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/question_validator.ex
@@ -47,8 +47,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator do
     # short identifier for PleromaFE to group statuses by context
     field(:context_id, :integer)
 
-    field(:likes, {:array, :string}, default: [])
-    field(:announcements, {:array, :string}, default: [])
+    field(:likes, {:array, ObjectValidators.ObjectID}, default: [])
+    field(:announcements, {:array, ObjectValidators.ObjectID}, default: [])
 
     field(:closed, ObjectValidators.DateTime)
     field(:voters, {:array, ObjectValidators.ObjectID}, default: [])