diff --git a/src/components/app/app.ts b/src/components/app/app.ts
index 9d1cd15..8810f9c 100644
--- a/src/components/app/app.ts
+++ b/src/components/app/app.ts
@@ -48,6 +48,9 @@ export default class App extends Vue
     // Static page
     staticPage: string = '';
 
+    // Dark mode
+    darkMode: boolean = false;
+
     /**
      * This is called when the instance is created.
      */