diff --git a/src/auth/auth.module.ts b/src/auth/auth.module.ts
index edaffa8..ff157f5 100644
--- a/src/auth/auth.module.ts
+++ b/src/auth/auth.module.ts
@@ -13,7 +13,7 @@ import { OAuthUtil } from './util/oauth.util';
 import { ContentsModule } from '../contents/contents.module';
 
 const accessTokenExpiration = TWOHOUR;
-export const refreshTokenExpirationInCache = 60 * 60 * 24 * 30;
+export const refreshTokenExpirationInCache = 60 * 60 * 24 * 365; // 1 year
 export const refreshTokenExpirationInCacheShortVersion = 60 * 60 * 24 * 2;
 export const verifyEmailExpiration = 60 * 5;
 
diff --git a/src/auth/jwt/jwt.payload.ts b/src/auth/jwt/jwt.payload.ts
index 13c9b22..6ac23a4 100644
--- a/src/auth/jwt/jwt.payload.ts
+++ b/src/auth/jwt/jwt.payload.ts
@@ -1,6 +1,6 @@
 export class Payload {
   email!: string; // user email
-  period!: string; // '30d' or '2h' that indicates whether or not you are an auto-login user
+  period!: string; // '1y' or '2d' that indicates whether or not you are an auto-login user
   sub!: number; // userId
 }