diff --git a/index.js b/index.js
index 81997ef..7f1c3b1 100644
--- a/index.js
+++ b/index.js
@@ -33,7 +33,7 @@ function get_handler ({ module_folder, file, opts, rethrow }) {
   const handler = require (path.join (process.cwd (), module_folder, file));
 
   return (req, res, next) => {
-    new Promise ((res) => res(handler (req, res, next, opts)))
+    new Promise ((resolve) => resolve (handler (req, res, next, opts)))
       .catch ((e) => {
         if (rethrow)
           throw e;