diff --git a/src/routes/api.cr b/src/routes/api.cr
index 73d922c..c2a45c0 100644
--- a/src/routes/api.cr
+++ b/src/routes/api.cr
@@ -664,7 +664,7 @@ struct APIRouter
         send_json env, {
           "success"    => true,
           "dimensions" => sizes,
-          "margin" => Config.current.page_margin
+          "margin"     => Config.current.page_margin,
         }.to_json
       rescue e
         send_json env, {