diff --git a/src/main/java/demo/api/auth/AuthServiceImpl.java b/src/main/java/demo/api/auth/AuthServiceImpl.java
index a98af71..a5b8a28 100644
--- a/src/main/java/demo/api/auth/AuthServiceImpl.java
+++ b/src/main/java/demo/api/auth/AuthServiceImpl.java
@@ -93,28 +93,28 @@ public class AuthServiceImpl implements AuthService {
   public ResponseEntity<TokenDto> regenerateToken(RegenerateTokenDto refreshTokenDto) {
     String refresh_token = refreshTokenDto.getRefresh_token();
     try {
-      // 1. Refresh Token 검증
+      // Refresh Token 검증
       if (!jwtTokenProvider.validateRefreshToken(refresh_token)) {
         throw new CustomException("Invalid refresh token supplied", HttpStatus.BAD_REQUEST);
       }
 
-      // 2. Access Token 에서 User email 를 가져옵니다.
+      // Access Token 에서 User email를 가져온다.
       Authentication authentication = jwtTokenProvider.getAuthenticationByRefreshToken(refresh_token);
 
-      // 3. Redis 에서 User email 을 기반으로 저장된 Refresh Token 값을 가져옵니다.
-      String refreshToken = (String)redisTemplate.opsForValue().get(authentication.getName());
+      // Redis에서 저장된 Refresh Token 값을 가져온다.
+      String refreshToken = redisTemplate.opsForValue().get(authentication.getName());
       if(!refreshToken.equals(refresh_token)) {
         throw new CustomException("Refresh Token doesn't match.", HttpStatus.BAD_REQUEST);
       }
 
-      // 4. 새로운 토큰 생성
+      // 토큰 재발행
       String new_refresh_token = jwtTokenProvider.generateRefreshToken(authentication);
       TokenDto tokenDto = new TokenDto(
           jwtTokenProvider.generateAccessToken(authentication),
           new_refresh_token
       );
 
-      // 5. RefreshToken Redis 업데이트
+      // RefreshToken Redis에 업데이트
       redisTemplate.opsForValue().set(
           authentication.getName(),
           new_refresh_token,
diff --git a/src/main/java/demo/api/config/RedisConfig.java b/src/main/java/demo/api/config/RedisConfig.java
index d3b51f4..ce91515 100644
--- a/src/main/java/demo/api/config/RedisConfig.java
+++ b/src/main/java/demo/api/config/RedisConfig.java
@@ -10,7 +10,6 @@ import org.springframework.data.redis.serializer.StringRedisSerializer;
 
 @Configuration
 public class RedisConfig {
-
   @Value("${redis.host}")
   private String redisHost;