diff --git a/src/main.ts b/src/main.ts
index 8731bcf..599a648 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -7,7 +7,9 @@ import messages from './lang'
 import 'normalize.css'
 import '@/scss/main.scss'
 
-const i18n = createI18n({
+type MessageSchema = typeof messages.en
+
+const i18n = createI18n<[MessageSchema], 'en' | 'de'>({
   locale: 'en',
   fallbackLocale: 'en',
   messages