diff --git a/server.js b/server.js
index 046966c..e378073 100644
--- a/server.js
+++ b/server.js
@@ -29,7 +29,7 @@ app.use(function(req, res, next) {
 
 var upload = multer({ storage: storage }).single('file')
 
-app.post('/upload', function(req, res) {
+app.post('/upload', function(req, res, next) {
 
     upload(req, res, function(err) {
         if (err instanceof multer.MulterError) {