diff --git a/src/main/java/com/bio/bio_backend/domain/base/member/service/MemberService.java b/src/main/java/com/bio/bio_backend/domain/base/member/service/MemberService.java
index 693cd0b..39440fa 100644
--- a/src/main/java/com/bio/bio_backend/domain/base/member/service/MemberService.java
+++ b/src/main/java/com/bio/bio_backend/domain/base/member/service/MemberService.java
@@ -1,13 +1,13 @@
 package com.bio.bio_backend.domain.base.member.service;
 
-import java.util.List;
-import java.util.Map;
-
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
 
 import com.bio.bio_backend.domain.base.member.dto.MemberDto;
 
+import java.util.List;
+import java.util.Map;
+
 public interface MemberService extends UserDetailsService {
 
     UserDetails loadUserByUsername(String id);
@@ -16,9 +16,9 @@ public interface MemberService extends UserDetailsService {
 
     String getRefreshToken(String id);
 
-    int deleteRefreshToken(String id);
+    void deleteRefreshToken(String id);
+
+    void updateMember(MemberDto member);
 
     List<MemberDto> selectMemberList(Map<String, String> params);
-
-    int updateMember(MemberDto member);
 }
diff --git a/src/main/java/com/bio/bio_backend/domain/base/member/service/MemberServiceImpl.java b/src/main/java/com/bio/bio_backend/domain/base/member/service/MemberServiceImpl.java
index 651306b..928feb6 100644
--- a/src/main/java/com/bio/bio_backend/domain/base/member/service/MemberServiceImpl.java
+++ b/src/main/java/com/bio/bio_backend/domain/base/member/service/MemberServiceImpl.java
@@ -63,13 +63,12 @@ public class MemberServiceImpl implements MemberService {
 
     @Override
     @Transactional
-    public int updateMember(MemberDto memberDto) {
+    public void updateMember(MemberDto memberDto) {
         Member member = memberRepository.findActiveMemberByUserId(memberDto.getUserId())
                 .orElseThrow(() -> new ApiException(ApiResponseCode.USER_NOT_FOUND));
         
         memberMapper.updateMemberFromDto(memberDto, member);
         memberRepository.save(member);
-        return 1;
     }
 
     @Override
@@ -82,13 +81,12 @@ public class MemberServiceImpl implements MemberService {
 
     @Override
     @Transactional
-    public int deleteRefreshToken(String id) {
+    public void deleteRefreshToken(String id) {
         Member member = memberRepository.findActiveMemberByUserId(id)
                 .orElseThrow(() -> new ApiException(ApiResponseCode.USER_NOT_FOUND));
         
         member.setRefreshToken(null);
         memberRepository.save(member);
-        return 1;
     }
 
     @Override