diff --git a/src/components/App/index.tsx b/src/components/App/index.tsx
index 1620585..68ae8e0 100644
--- a/src/components/App/index.tsx
+++ b/src/components/App/index.tsx
@@ -38,8 +38,8 @@ export type DocAnalytics = {
 };
 
 export interface AppProps {
-    lang: Lang;
-    langs: Lang[];
+    lang: `${Lang}`;
+    langs: `${Lang}`[];
     router: RouterConfig;
     search?: SearchConfig;
     analytics?: DocAnalytics;