diff --git a/src/util/web.cr b/src/util/web.cr
index e74d4f9..3662edb 100644
--- a/src/util/web.cr
+++ b/src/util/web.cr
@@ -60,7 +60,9 @@ end
 
 macro cors
   env.response.headers["Allow"] = "HEAD,GET,PUT,POST,DELETE,OPTIONS"
-  env.response.headers["Access-Control-Allow-Headers"] = "X-Requested-With, X-HTTP-Method-Override, Content-Type, Cache-Control, Accept, Authorization"
+  env.response.headers["Access-Control-Allow-Headers"] = "X-Requested-With," \
+    "X-HTTP-Method-Override, Content-Type, Cache-Control, Accept," \
+    "Authorization"
   env.response.headers["Access-Control-Allow-Origin"] = "*"
 end