diff --git a/src/main/index.ts b/src/main/index.ts
index 5306485..3dcef62 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -116,7 +116,9 @@ async function bootstrap(): Promise<void> {
 }
 
 app.on('second-instance', () => {
-  showAndFocusWindow();
+  if (mainWindow && !mainWindow.isDestroyed()) {
+    showAndFocusWindow(mainWindow);
+  }
 });
 
 app.whenReady().then(bootstrap);