diff --git a/src/main/java/com/diareat/diareat/auth/component/JwtTokenProvider.java b/src/main/java/com/diareat/diareat/auth/component/JwtTokenProvider.java
index eed48e3..cbaa13d 100644
--- a/src/main/java/com/diareat/diareat/auth/component/JwtTokenProvider.java
+++ b/src/main/java/com/diareat/diareat/auth/component/JwtTokenProvider.java
@@ -67,6 +67,6 @@ public boolean validateToken(String jwtToken) {
 
     // Request의 Header에서 token 값 가져오기
     public String resolveToken(HttpServletRequest request) {
-        return request.getHeader("X-AUTH-TOKEN");
+        return request.getHeader("accessToken");
     }
 }
diff --git a/src/main/java/com/diareat/diareat/auth/service/CustomUserDetailService.java b/src/main/java/com/diareat/diareat/auth/service/CustomUserDetailService.java
index 622e09f..f74e6fd 100644
--- a/src/main/java/com/diareat/diareat/auth/service/CustomUserDetailService.java
+++ b/src/main/java/com/diareat/diareat/auth/service/CustomUserDetailService.java
@@ -15,8 +15,8 @@ public class CustomUserDetailService implements UserDetailsService {
     private final UserRepository userRepository;
 
     @Override
-    public UserDetails loadUserByUsername(String keyCode) throws UsernameNotFoundException {
-        return userRepository.findByKeyCode(keyCode)
+    public UserDetails loadUserByUsername(String id) throws UsernameNotFoundException {
+        return userRepository.findById(Long.parseLong(id))
                 .orElseThrow(() -> new UsernameNotFoundException(ResponseCode.USER_NOT_FOUND.getMessage()));
     }
 }