diff --git a/api/mail-config.js b/api/mail-config.js
index 1c8aff80..8e216571 100644
--- a/api/mail-config.js
+++ b/api/mail-config.js
@@ -1,4 +1,4 @@
-import dns from 'dns';
+import { promises as dns } from 'dns';
 import URL from 'url-parse';
 import middleware from './_common/middleware.js';