diff --git a/dictation_server/src/main.ts b/dictation_server/src/main.ts
index 1f19992..9f2a4fa 100644
--- a/dictation_server/src/main.ts
+++ b/dictation_server/src/main.ts
@@ -18,7 +18,7 @@ async function bootstrap() {
   //XXX 特定のオリジンからのリクエストは許可する
   app.enableCors({
     origin: 'http://localhost:8180',
-    methods: 'GET,PUT,POST,DELETE',
+    methods: 'GET,PUT,POST,DELETE,OPTION',
     allowedHeaders: 'Content-Type',
   });
   app.use(