diff --git a/README.md b/README.md
index fa38e8a..3032b92 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@
 <br><br>
 
 ## 🛠️ Architecture Structure
-<img width="798" alt="image" src="https://github.com/GEON-PPANG/GEON-PPANG-SERVER/assets/89137120/30a727d6-4820-4067-818e-4d13945abcc2">
+![건빵_아키텍쳐](https://github.com/GEON-PPANG/GEON-PPANG-SERVER/assets/89137120/cc12bdc2-97b4-4cba-bf54-b40ed45032b5)
 
 
 <br><br>
diff --git a/api/src/main/java/com/org/gunbbang/auth/jwt/service/JwtService.java b/api/src/main/java/com/org/gunbbang/auth/jwt/service/JwtService.java
index d7bc2ef..35d09e1 100644
--- a/api/src/main/java/com/org/gunbbang/auth/jwt/service/JwtService.java
+++ b/api/src/main/java/com/org/gunbbang/auth/jwt/service/JwtService.java
@@ -21,6 +21,7 @@
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 @Service
 @RequiredArgsConstructor
@@ -98,6 +99,7 @@ public void reIssueTokensAndUpdateRefreshToken(HttpServletResponse response, Mem
   }
 
   /** GUEST였던 회원이 닉네임 변경하고 USER로 되었을 때 사용 */
+  @Transactional
   public void reIssueTokensAndUpdateRefreshToken(HttpServletResponse response, Long memberId) {
     Member foundMember =
         memberRepository
@@ -235,6 +237,7 @@ public boolean isTokenExpired(String token) {
     }
   }
 
+  @Transactional
   public void updateRefreshTokenByMemberId(Long memberId, String refreshToken) {
     memberRepository
         .findById(memberId)