diff --git a/.travis.yml b/.travis.yml
index 16574d9..f4be7a0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: node_js
-node_js: stable
+node_js: 10
 script: npm run test
 notifications:
   email: false
diff --git a/mock/mock-server.js b/mock/mock-server.js
index ccce04d..4c4cb2a 100644
--- a/mock/mock-server.js
+++ b/mock/mock-server.js
@@ -48,17 +48,21 @@ module.exports = app => {
     ignoreInitial: true
   }).on('all', (event, path) => {
     if (event === 'change' || event === 'add') {
-      // remove mock routes stack
-      app._router.stack.splice(mockStartIndex, mockRoutesLength)
+      try {
+        // remove mock routes stack
+        app._router.stack.splice(mockStartIndex, mockRoutesLength)
 
-      // clear routes cache
-      unregisterRoutes()
+        // clear routes cache
+        unregisterRoutes()
 
-      const mockRoutes = registerRoutes(app)
-      mockRoutesLength = mockRoutes.mockRoutesLength
-      mockStartIndex = mockRoutes.mockStartIndex
+        const mockRoutes = registerRoutes(app)
+        mockRoutesLength = mockRoutes.mockRoutesLength
+        mockStartIndex = mockRoutes.mockStartIndex
 
-      console.log(chalk.magentaBright(`\n > Mock Server hot reload success! changed  ${path}`))
+        console.log(chalk.magentaBright(`\n > Mock Server hot reload success! changed  ${path}`))
+      } catch (error) {
+        console.log(chalk.redBright(error))
+      }
     }
   })
 }
diff --git a/src/layout/components/AppMain.vue b/src/layout/components/AppMain.vue
index e01ec98..178d579 100644
--- a/src/layout/components/AppMain.vue
+++ b/src/layout/components/AppMain.vue
@@ -27,5 +27,7 @@ export default {
 }
 .fixed-header+.app-main {
   padding-top: 50px;
+  height: 100vh;
+  overflow: auto;
 }
 </style>
diff --git a/vue.config.js b/vue.config.js
index be1b518..4ad716c 100644
--- a/vue.config.js
+++ b/vue.config.js
@@ -7,6 +7,9 @@ function resolve(dir) {
 }
 
 const name = defaultSettings.title || 'vue Admin Template' // page title
+// If your port is set to 80,
+// use administrator privileges to execute the command line.
+// For example, Mac: sudo npm run
 const port = 9528 // dev port
 
 // All configuration item explanations can be find in https://cli.vuejs.org/config/