diff --git a/src/app/routes/api.$.tsx b/src/app/routes/api.$.tsx
index 0f08102..0af19b3 100644
--- a/src/app/routes/api.$.tsx
+++ b/src/app/routes/api.$.tsx
@@ -1,11 +1,11 @@
-import { ActionFunction, json, LoaderFunction } from '@remix-run/node';
-import { authenticate } from 'src/app/server/authenticate';
+import { ActionFunction, LoaderFunction } from '@remix-run/node';
+import { authenticate, authenticateWithoutRedirection } from 'src/app/server/authenticate';
 import { commitSession } from 'src/app/server/sessions';
 
 const apiURL = new URL(process.env.API_BASE_URL ?? '');
 
 export const loader: LoaderFunction = async (args) => {
-  const { accessToken, newSession } = await authenticate(args.request);
+  const { accessToken, newSession } = (await authenticate(args.request)) ?? {};
 
   const url = new URL(args.request.url);
   url.protocol = apiURL.protocol;
@@ -21,15 +21,13 @@ export const loader: LoaderFunction = async (args) => {
       },
     }),
   );
-  return json(await response.json(), {
-    headers: {
-      ...(newSession && { 'Set-Cookie': await commitSession(newSession) }),
-    },
-  });
+  if (newSession) response.headers.set('Set-Cookie', await commitSession(newSession));
+
+  return response;
 };
 
 export const action: ActionFunction = async (args) => {
-  const { accessToken, newSession } = await authenticate(args.request);
+  const { accessToken, newSession } = (await authenticateWithoutRedirection(args.request)) ?? {};
 
   const url = new URL(args.request.url);
   url.protocol = apiURL.protocol;
@@ -46,9 +44,8 @@ export const action: ActionFunction = async (args) => {
       },
     }),
   );
-  return json(await response.json(), {
-    headers: {
-      ...(newSession && { 'Set-Cookie': await commitSession(newSession) }),
-    },
-  });
+
+  if (newSession) response.headers.set('Set-Cookie', await commitSession(newSession));
+
+  return response;
 };
diff --git a/src/app/server/authenticate.ts b/src/app/server/authenticate.ts
index 4a893b2..c200162 100644
--- a/src/app/server/authenticate.ts
+++ b/src/app/server/authenticate.ts
@@ -3,12 +3,22 @@ import { destroySession, generateExpiredDate, getAuthSession, isDateExpired } fr
 import { refreshToken } from 'src/types';
 
 export const authenticate = async (request: Request) => {
+  const token = authenticateWithoutRedirection(request);
+
+  if (!token) {
+    throw redirect('/login');
+  }
+
+  return token;
+};
+
+export const authenticateWithoutRedirection = async (request: Request) => {
   const session = await getAuthSession(request);
   const expiredAt = session.get('expiredAt');
   const accessToken = session.get('accessToken');
 
   if (!accessToken) {
-    throw redirect('/login');
+    return null;
   }
 
   if (!expiredAt || isDateExpired(expiredAt)) {