diff --git a/src/main/java/com/mpnp/baechelin/login/oauth/entity/UserPrincipal.java b/src/main/java/com/mpnp/baechelin/login/oauth/entity/UserPrincipal.java
index 6ee2e0a..a8f87c5 100644
--- a/src/main/java/com/mpnp/baechelin/login/oauth/entity/UserPrincipal.java
+++ b/src/main/java/com/mpnp/baechelin/login/oauth/entity/UserPrincipal.java
@@ -87,12 +87,19 @@ public OidcIdToken getIdToken() {
     // spring security -> userService(CustomOAuth2UserService)에서 사용자의 속성을 가져오기 위한 전처리.
     // spring security -> userDetailService 설정을 위해 사용
     public static UserPrincipal create(User user) {
+        SimpleGrantedAuthority simpleGrantedAuthority;
+        if (user.getRoleType().getCode().equals("ROLE_ADMIN")) {
+            simpleGrantedAuthority = new SimpleGrantedAuthority(RoleType.ADMIN.getCode());
+        } else {
+            simpleGrantedAuthority = new SimpleGrantedAuthority(RoleType.USER.getCode());
+        }
+        
         return UserPrincipal.builder()
                 .userId(user.getSocialId())
                 .password(user.getPassword())
                 .providerType(user.getProviderType())
                 .roleType(user.getRoleType())
-                .authorities(Collections.singletonList(new SimpleGrantedAuthority(RoleType.USER.getCode())))
+                .authorities(Collections.singletonList(simpleGrantedAuthority))
                 .build();
     }
 
diff --git a/src/main/java/com/mpnp/baechelin/login/oauth/service/CustomOAuth2UserService.java b/src/main/java/com/mpnp/baechelin/login/oauth/service/CustomOAuth2UserService.java
index f9179ca..fecee38 100644
--- a/src/main/java/com/mpnp/baechelin/login/oauth/service/CustomOAuth2UserService.java
+++ b/src/main/java/com/mpnp/baechelin/login/oauth/service/CustomOAuth2UserService.java
@@ -86,7 +86,7 @@ private User createUser(OAuth2UserInfo userInfo, ProviderType providerType) {
         return userRepository.saveAndFlush(user);
     }
 
-    private User updateUser(User user, OAuth2UserInfo userInfo) {
+    private void updateUser(User user, OAuth2UserInfo userInfo) {
         // DB에 있는 user name과 소셜에서 보내준 user name이 다를 시 DB 업데이트
         // 즉, 소셜에서 이름을 바꿨으면 업데이트
         if (userInfo.getName() != null && !user.getName().equals(userInfo.getName())) {
@@ -98,7 +98,6 @@ private User updateUser(User user, OAuth2UserInfo userInfo) {
             user.setProfileImageUrl(userInfo.getImageUrl());
         }
 
-        return user;
     }
 
 }