diff --git a/src/app.ts b/src/app.ts
index baa9456..b41a651 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,6 +1,14 @@
-import { initDb } from './backend/services/db';
 import 'reflect-metadata';
 
+import axios from 'axios';
+
+import { initDb } from './backend/services/db';
+import { ua } from './backend/services/misskey';
+
+axios.defaults.headers['User-Agent'] = ua;
+axios.defaults.headers['Content-Type'] = 'application/json';
+axios.defaults.validateStatus = (stat) => stat < 500;
+
 (async () => {
 	await initDb();
 	(await import('./backend/services/worker')).default();
diff --git a/src/backend/router.ts b/src/backend/router.ts
index 6ca3eeb..af70eb9 100644
--- a/src/backend/router.ts
+++ b/src/backend/router.ts
@@ -105,7 +105,8 @@ router.get('/miauth', async ctx => {
 	}
 
 	const url = `https://${host}/api/miauth/${session}/check`;
-	const { token, user } = (await axios.post(url)).data;
+	const res = await axios.post(url, {});
+	const { token, user } = res.data;
 
 	if (!token || !user) {
 		await die(ctx);
diff --git a/src/backend/services/misskey.ts b/src/backend/services/misskey.ts
index 767e248..3428a04 100644
--- a/src/backend/services/misskey.ts
+++ b/src/backend/services/misskey.ts
@@ -2,9 +2,6 @@ import axios from 'axios';
 
 export const ua = `Mozilla/5.0 MisskeyTools +https://github.com/Xeltica/MisskeyTools Node/${process.version}`;
 
-axios.defaults.headers['User-Agent'] = ua;
-axios.defaults.validateStatus = (stat) => stat < 500;
-
 /**
  * Misskey APIを呼び出す
  */