diff --git a/lib/pleroma/web/mastodon_api/views/status_view.ex b/lib/pleroma/web/mastodon_api/views/status_view.ex
index d97b2acb4..38abdb35f 100644
--- a/lib/pleroma/web/mastodon_api/views/status_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/status_view.ex
@@ -120,7 +120,7 @@ def render("attachment.json", %{attachment: attachment}) do
     << hash_id::signed-32, _rest::binary >> = :crypto.hash(:md5, href)
 
     %{
-      id: attachment["id"] || hash_id,
+      id: to_string(attachment["id"] || hash_id),
       url: href,
       remote_url: href,
       preview_url: href,
diff --git a/test/web/mastodon_api/status_view_test.exs b/test/web/mastodon_api/status_view_test.exs
index 601e551a9..93c0b7236 100644
--- a/test/web/mastodon_api/status_view_test.exs
+++ b/test/web/mastodon_api/status_view_test.exs
@@ -78,7 +78,7 @@ test "attachments" do
     }
 
     expected = %{
-      id: 1638338801,
+      id: "1638338801",
       type: "image",
       url: "someurl",
       remote_url: "someurl",
@@ -90,7 +90,7 @@ test "attachments" do
 
     # If theres a "id", use that instead of the generated one
     object = Map.put(object, "id", 2)
-    assert %{id: 2} = StatusView.render("attachment.json", %{attachment: object})
+    assert %{id: "2"} = StatusView.render("attachment.json", %{attachment: object})
   end
 
   test "a reblog" do