diff --git a/index.js b/index.js
index 5cfa439..dad53fd 100644
--- a/index.js
+++ b/index.js
@@ -150,7 +150,7 @@ function createServer() {
             .toString()
             .replace('</head>', HMR_SCRIPT + '</head>')
 
-          res.setHeader('content-length', code.length)
+          res.setHeader('content-length', Buffer.byteLength(code))
         } else {
           res.setHeader('content-length', stat.size)
         }
@@ -173,7 +173,7 @@ function createServer() {
 
             res.setHeader('accept-ranges', 'bytes')
             res.setHeader('content-type', MIME_TYPES.html)
-            res.setHeader('content-length', code.length)
+            res.setHeader('content-length', Buffer.byteLength(code))
             res.writeHead(200, 'OK')
 
             res.end(code)
diff --git a/package.json b/package.json
index 4b65422..5b9046b 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "simple-http",
   "displayName": "simple http",
   "description": "🔥 简单的http服务器, 方便临时调试html",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "publisher": "yutent",
   "author": "Yutent [@yutent]",
   "icon": "logo.png",