diff --git a/bin/serve.js b/bin/serve.js
index a669d534..1280c3c9 100644
--- a/bin/serve.js
+++ b/bin/serve.js
@@ -74,7 +74,7 @@ const start = () => {
         name: file.replace(/.*\\([^\\]+).vue/g, '$1'),
         path: file.replace(/^src\\(.*).vue/g, '$1').replace(/\\/g, '/')
       }
-      let vue = fs.readFileSync(file)?.toString()
+      let vue = fs.readFileSync(file).toString()
       if (/appName/.test(vue)) {
         let appName = vue.replace(/[\s\S]*(appName:.+),[\s\S]*/gm, '$1'),
             title = appName.replace(/(appName:|["'])/g, '')
@@ -89,7 +89,7 @@ const start = () => {
           name: file.replace(/.*\\([^\\]+).vue/g, '$1'),
           path: file.replace(/^src\\(.*).vue/g, '$1').replace(/\\/g, '/')
         }
-        let vue = fs.readFileSync(file)?.toString()
+        let vue = fs.readFileSync(file).toString()
         if (/appName/.test(vue)) {
           let appName = vue.replace(/[\s\S]*(appName:.+),[\s\S]*/gm, '$1'),
               title = appName.replace(/(appName:|["'])/g, '')