diff --git a/src/background.ts b/src/background.ts
index 7b4337ad..214d78d8 100644
--- a/src/background.ts
+++ b/src/background.ts
@@ -16,7 +16,10 @@ import { logger } from './main/logger'
 import os from 'os'
 const isDevelopment = process.env.NODE_ENV !== 'production'
 
-// Scheme must be registered before the app is ready
+if (!app.requestSingleInstanceLock()) {
+  app.exit()
+}
+
 protocol.registerSchemesAsPrivileged([{ scheme: 'app', privileges: { secure: true, standard: true } }])
 app.allowRendererProcessReuse = true
 if (!config.get('hardwareAcceleration')) {