diff --git a/api/src/index.ts b/api/src/index.ts
index e3a45ba5e..78b83966a 100644
--- a/api/src/index.ts
+++ b/api/src/index.ts
@@ -24,7 +24,8 @@ app.use(
       if (
         origin.startsWith("https://") &&
         (origin.endsWith("flutterkaigi-ticket-2024.pages.dev") ||
-          origin.endsWith("flutterkaigi-ticket-2024-staging.pages.dev"))
+          origin.endsWith("flutterkaigi-ticket-2024-staging.pages.dev") ||
+          origin.endsWith("flutterkaigi.jp"))
       ) {
         return origin;
       }