diff --git a/middleware/cors.js b/middleware/cors.js
index bda2f90..6b94c23 100644
--- a/middleware/cors.js
+++ b/middleware/cors.js
@@ -11,8 +11,8 @@ export function createCors() {
     let opts = this.get('cors')
 
     if (opts.enabled) {
-      let origin = req.header('origin') || req.header('referer') || ''
-      let headers = req.header('access-control-request-headers')
+      let origin = req.headers['origin'] || req.headers['referer'] || ''
+      let headers = req.headers['access-control-request-headers']
       let { hostname, host, protocol } = parse(origin)
 
       if (opts.origin.length && hostname) {
@@ -24,7 +24,7 @@ export function createCors() {
           }
         }
         if (pass === false) {
-          return res.end('')
+          return (res.body = null)
         }
       }
       if (opts.credentials) {
@@ -43,7 +43,7 @@ export function createCors() {
       }
 
       if (req.method === 'OPTIONS') {
-        return res.end('')
+        return (res.body = null)
       }
     }
     next()
diff --git a/package.json b/package.json
index 1950e23..2c27899 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@gm5/core",
-  "version": "2.0.1",
+  "version": "2.0.2",
   "type": "module",
   "description": "Five.js, 一个轻量级的nodejs mvc框架 旨在简单易用, 5分钟即可上手",
   "author": "yutent <yutent.io@gmail.com>",