diff --git a/main.js b/main.js
index af24f19..c7368f7 100644
--- a/main.js
+++ b/main.js
@@ -331,6 +331,8 @@ let avatarCache = {};
 let avatarPlaceholder = `${__dirname}/src/assets/images/user-fallback.png`;
 const icon = `${__dirname}/src/assets/images/dock.png`;
 
+
+
 async function getIcon(cookies, userid, src) {
     var cached = avatarCache[userid];
     var icon;
@@ -704,6 +706,16 @@ const createMainWindow = () => {
     createMenu();
 };
 
+// 实现单例，在启动第二个实例后，激活主窗口，然后退出第二个实例
+const shouldQuit = app.makeSingleInstance(() => {
+    if (mainWindow) {
+        if (mainWindow.isMinimized()) mainWindow.restore()
+        mainWindow.focus()
+    }
+})
+
+shouldQuit && app.quit()
+
 app.setName(pkg.name);
 app.dock && app.dock.setIcon(icon);
 
@@ -712,6 +724,7 @@ app.on('before-quit', () => {
     // Fix issues #14
     forceQuit = true;
 });
+
 app.on('activate', e => {
     if (!mainWindow.isVisible()) {
         mainWindow.show();