Updated the project.

my-app/node_modules/express/lib/router/index.js

@@ -36,7 +36,7 @@ var toString = Object.prototype.toString;
  * Initialize a new `Router` with the given `options`.
  *
  * @param {Object} [options]
- * @return {Router} which is an callable function
+ * @return {Router} which is a callable function
  * @public
  */
 

my-app/node_modules/express/lib/router/route.js

@@ -60,7 +60,10 @@ Route.prototype._handles_method = function _handles_method(method) {
     return true;
   }
 
-  var name = method.toLowerCase();
+  // normalize name
+  var name = typeof method === 'string'
+    ? method.toLowerCase()
+    : method
 
   if (name === 'head' && !this.methods['head']) {
     name = 'get';
@@ -103,8 +106,10 @@ Route.prototype.dispatch = function dispatch(req, res, done) {
   if (stack.length === 0) {
     return done();
   }
+  var method = typeof req.method === 'string'
+    ? req.method.toLowerCase()
+    : req.method
 
-  var method = req.method.toLowerCase();
   if (method === 'head' && !this.methods['head']) {
     method = 'get';
   }