diff --git a/benchmarks/middleware.js b/benchmarks/middleware.js
index 401d244..e6bc6a7 100644
--- a/benchmarks/middleware.js
+++ b/benchmarks/middleware.js
@@ -1,7 +1,6 @@
 
 'use strict';
 
-const http = require('http');
 const Koa = require('..');
 const app = new Koa();