diff --git a/packages/gui/extra/favicon.ico b/packages/gui/extra/favicon.ico
index 89bfe2b2..21b26b2c 100644
Binary files a/packages/gui/extra/favicon.ico and b/packages/gui/extra/favicon.ico differ
diff --git a/packages/gui/public/256x256.png b/packages/gui/public/256x256.png
new file mode 100644
index 00000000..dc41d743
Binary files /dev/null and b/packages/gui/public/256x256.png differ
diff --git a/packages/gui/public/favicon.ico b/packages/gui/public/favicon.ico
index 89bfe2b2..21b26b2c 100644
Binary files a/packages/gui/public/favicon.ico and b/packages/gui/public/favicon.ico differ
diff --git a/packages/gui/public/icon.png b/packages/gui/public/icon.png
index 104266a2..ed4e3f63 100644
Binary files a/packages/gui/public/icon.png and b/packages/gui/public/icon.png differ
diff --git a/packages/gui/public/icon3.png b/packages/gui/public/icon3.png
deleted file mode 100644
index b14da40d..00000000
Binary files a/packages/gui/public/icon3.png and /dev/null differ
diff --git a/packages/gui/src/background.js b/packages/gui/src/background.js
index ab06549f..439dbd7b 100644
--- a/packages/gui/src/background.js
+++ b/packages/gui/src/background.js
@@ -40,7 +40,7 @@ function setTray (app) {
     }
   ]
   // 设置系统托盘图标
-  let icon = '32x32.png'
+  let icon = '128x128.png'
   if (isMac) {
     icon = '16x16.png'
   }
@@ -89,7 +89,7 @@ function createWindow () {
       nodeIntegration: true// process.env.ELECTRON_NODE_INTEGRATION
     },
     // eslint-disable-next-line no-undef
-    icon: path.join(__dirname, '../build/icons/icon.png')
+    icon: path.join(__static, 'icon.png')
   })
 
   if (process.env.WEBPACK_DEV_SERVER_URL) {
diff --git a/packages/gui/src/view/components/setup-ca.vue b/packages/gui/src/view/components/setup-ca.vue
index 092630d1..268c055e 100644
--- a/packages/gui/src/view/components/setup-ca.vue
+++ b/packages/gui/src/view/components/setup-ca.vue
@@ -15,8 +15,15 @@
       <a-button type="primary" style="float:right" @click="doSetup()">点此去安装</a-button>
     </template>
     <div>
-      请按如下步骤将<b>本地随机生成</b>的根证书添加到<b>信任的根证书颁发机构</b><br/>
-      证书是本地随机生成，所以信任它是安全的
+      <b>本应用正常使用必须信任本地自动随机生成的根证书</b><br/>
+      1、点击右上角“点此去安装按钮”<br/>
+      <template v-if="this.systemPlatform === 'mac'">
+        2、然后按如下图步骤将随机生成的根证书设置为信任<br/>
+      </template>
+      <template v-else>
+        2、然后按如下图步骤将根证书添加到<b>信任的根证书颁发机构</b><br/>
+      </template>
+
     </div>
     <img width="100%" :src="setupImage" />
 
diff --git a/packages/gui/vue.config.js b/packages/gui/vue.config.js
index 6be43adf..3fb9aa3c 100644
--- a/packages/gui/vue.config.js
+++ b/packages/gui/vue.config.js
@@ -55,6 +55,9 @@ module.exports = {
         mac: {
           target: 'dmg'
         },
+        win: {
+          icon: '/public/icon.png'
+        },
         publish: {
           provider: 'generic',
           url: ''