diff --git a/app/user/api/routers/v1/auth.py b/app/user/api/routers/v1/auth.py
index 9a6e22c..3981621 100644
--- a/app/user/api/routers/v1/auth.py
+++ b/app/user/api/routers/v1/auth.py
@@ -461,7 +461,7 @@ async def generate_test_token(
     session.add(db_refresh_token)
 
     # 마지막 로그인 시간 업데이트
-    user.last_login_at = now()
+    user.last_login_at = now().replace(tzinfo=None)
     await session.commit()
 
     logger.info(
diff --git a/app/user/services/auth.py b/app/user/services/auth.py
index aa648c1..35269e7 100644
--- a/app/user/services/auth.py
+++ b/app/user/services/auth.py
@@ -168,7 +168,7 @@ class AuthService:
         logger.debug(f"[AUTH] 리프레시 토큰 저장 완료 - user_id: {user.id}, user_uuid: {user.user_uuid}")
 
         # 7. 마지막 로그인 시간 업데이트
-        user.last_login_at = now()
+        user.last_login_at = now().replace(tzinfo=None)
         await session.commit()
 
         redirect_url = f"{prj_settings.PROJECT_DOMAIN}"
@@ -223,7 +223,7 @@ class AuthService:
         if db_token.is_revoked:
             raise TokenRevokedError()
 
-        if db_token.expires_at < now():
+        if db_token.expires_at < now().replace(tzinfo=None):
             raise TokenExpiredError()
 
         # 4. 사용자 확인
@@ -483,7 +483,7 @@ class AuthService:
             .where(RefreshToken.token_hash == token_hash)
             .values(
                 is_revoked=True,
-                revoked_at=now(),
+                revoked_at=now().replace(tzinfo=None),
             )
         )
         await session.commit()
@@ -508,7 +508,7 @@ class AuthService:
             )
             .values(
                 is_revoked=True,
-                revoked_at=now(),
+                revoked_at=now().replace(tzinfo=None),
             )
         )
         await session.commit()
diff --git a/app/user/services/jwt.py b/app/user/services/jwt.py
index 4f38658..ebcf2d6 100644
--- a/app/user/services/jwt.py
+++ b/app/user/services/jwt.py
@@ -107,7 +107,7 @@ def get_refresh_token_expires_at() -> datetime:
     Returns:
         리프레시 토큰 만료 datetime (로컬 시간)
     """
-    return now() + timedelta(
+    return now().replace(tzinfo=None) + timedelta(
         days=jwt_settings.JWT_REFRESH_TOKEN_EXPIRE_DAYS
     )