diff --git a/app/types/vue-router.d.ts b/app/types/vue-router.d.ts
index 4532ae2..9eff852 100644
--- a/app/types/vue-router.d.ts
+++ b/app/types/vue-router.d.ts
@@ -4,6 +4,8 @@ declare module 'vue-router' {
     title?: string
     /** i18n key */
     i18n?: string
+    /** sub title */
+    subTitle?: string
   }
 }