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 837787b9f..59fef42d6 100644
--- a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
+++ b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex
@@ -68,12 +68,14 @@ def fix_media_type(data) do
     end
   end
 
-  defp handle_href(href, mediaType) do
+  defp handle_href(href, mediaType, data) do
     [
       %{
         "href" => href,
         "type" => "Link",
-        "mediaType" => mediaType
+        "mediaType" => mediaType,
+        "width" => data["width"],
+        "height" => data["height"]
       }
     ]
   end
@@ -81,10 +83,10 @@ defp handle_href(href, mediaType) do
   defp fix_url(data) do
     cond do
       is_binary(data["url"]) ->
-        Map.put(data, "url", handle_href(data["url"], data["mediaType"]))
+        Map.put(data, "url", handle_href(data["url"], data["mediaType"], data))
 
       is_binary(data["href"]) and data["url"] == nil ->
-        Map.put(data, "url", handle_href(data["href"], data["mediaType"]))
+        Map.put(data, "url", handle_href(data["href"], data["mediaType"], data))
 
       true ->
         data
diff --git a/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs b/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs
index 0e49fda99..9150b8d41 100644
--- a/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs
+++ b/test/pleroma/web/activity_pub/object_validators/attachment_validator_test.exs
@@ -105,5 +105,37 @@ test "it handles image dimensions" do
 
       assert attachment.mediaType == "image/jpeg"
     end
+
+    test "it transforms image dimentions to our internal format" do
+      attachment = %{
+        "type" => "Document",
+        "name" => "Hello world",
+        "url" => "https://media.example.tld/1.jpg",
+        "width" => 880,
+        "height" => 960,
+        "mediaType" => "image/jpeg",
+        "blurhash" => "eTKL26+HDjcEIBVl;ds+K6t301W.t7nit7y1E,R:v}ai4nXSt7V@of"
+      }
+
+      expected = %AttachmentValidator{
+        type: "Document",
+        name: "Hello world",
+        mediaType: "image/jpeg",
+        blurhash: "eTKL26+HDjcEIBVl;ds+K6t301W.t7nit7y1E,R:v}ai4nXSt7V@of",
+        url: [
+          %AttachmentValidator.UrlObjectValidator{
+            type: "Link",
+            mediaType: "image/jpeg",
+            href: "https://media.example.tld/1.jpg",
+            width: 880,
+            height: 960
+          }
+        ]
+      }
+
+      {:ok, ^expected} =
+        AttachmentValidator.cast_and_validate(attachment)
+        |> Ecto.Changeset.apply_action(:insert)
+    end
   end
 end