diff --git a/flick-adapter/http/src/main/java/sigma/http/member/MemberController.java b/flick-adapter/http/src/main/java/sigma/http/member/MemberController.java
index ee3bf36..893dc09 100644
--- a/flick-adapter/http/src/main/java/sigma/http/member/MemberController.java
+++ b/flick-adapter/http/src/main/java/sigma/http/member/MemberController.java
@@ -36,6 +36,6 @@ public String newAccessToKen(@RequestHeader(value = "RefreshToken") String token
 
     @PostMapping("/setFirebase/{memberId}")
     public void setFirebaseToken(@PathVariable(value = "memberId") String memberId, @RequestBody SetFirebaseTokenRequest setFirebaseTokenRequest){
-        return;newTokenUseCase.setNewFirebaseToken(memberId,setFirebaseTokenRequest.firebaseToken());
+        newTokenUseCase.setNewFirebaseToken(memberId,setFirebaseTokenRequest.firebaseToken());
     }
 }
\ No newline at end of file
diff --git a/flick-adapter/jpa/src/main/java/sigma/jpa/account/AccountConverter.java b/flick-adapter/jpa/src/main/java/sigma/jpa/account/AccountConverter.java
index c2fb187..19068e5 100644
--- a/flick-adapter/jpa/src/main/java/sigma/jpa/account/AccountConverter.java
+++ b/flick-adapter/jpa/src/main/java/sigma/jpa/account/AccountConverter.java
@@ -2,7 +2,7 @@
 
 import sigma.domain.account.model.Account;
 import sigma.domain.account.model.value.*;
-import sigma.domain.account.model.value.AccountNumber;
+import sigma.domain.member.model.value.MemberId;
 
 abstract class AccountConverter {
 
@@ -14,7 +14,7 @@ static Account toDomain(final AccountJPAEntity entity) {
         return Account.builder()
                 .id(new AccountId(entity.getId()))
                 .accountInfo(new AccountInfo(entity.getNumber(), entity.getName()))
-                .holderId(new HolderId(entity.getHolderId()))
+                .holderId(new HolderId(new MemberId(entity.getHolderId())))
                 .balance(new Balance(entity.getBalance()))
                 .type(entity.getType())
                 .profile(new Profile(entity.getProfileImage()))
diff --git a/flick-adapter/jpa/src/main/java/sigma/jpa/account/AccountJPAEntity.java b/flick-adapter/jpa/src/main/java/sigma/jpa/account/AccountJPAEntity.java
index a68a2c4..10b863c 100644
--- a/flick-adapter/jpa/src/main/java/sigma/jpa/account/AccountJPAEntity.java
+++ b/flick-adapter/jpa/src/main/java/sigma/jpa/account/AccountJPAEntity.java
@@ -24,7 +24,7 @@ public class AccountJPAEntity extends AbstractIdEntity {
     private String name;
 
     @NotNull
-    private Long holderId;
+    private String holderId;
 
     @NotNull
     private Long balance;
diff --git a/flick-adapter/jpa/src/main/java/sigma/jpa/account/GroupMemberJPAEntity.java b/flick-adapter/jpa/src/main/java/sigma/jpa/account/GroupMemberJPAEntity.java
index 6f03cf1..8d2ef56 100644
--- a/flick-adapter/jpa/src/main/java/sigma/jpa/account/GroupMemberJPAEntity.java
+++ b/flick-adapter/jpa/src/main/java/sigma/jpa/account/GroupMemberJPAEntity.java
@@ -17,7 +17,7 @@
 public class GroupMemberJPAEntity extends AbstractIdEntity {
 
     @NotNull
-    private Long memberId;
+    private String memberId;
     @NotNull
     private Long accountId;
 
diff --git a/flick-adapter/jpa/src/main/java/sigma/jpa/member/MemberJPAAdapter.java b/flick-adapter/jpa/src/main/java/sigma/jpa/member/MemberJPAAdapter.java
index e61c2c3..2ca1c49 100644
--- a/flick-adapter/jpa/src/main/java/sigma/jpa/member/MemberJPAAdapter.java
+++ b/flick-adapter/jpa/src/main/java/sigma/jpa/member/MemberJPAAdapter.java
@@ -1,7 +1,6 @@
 package sigma.jpa.member;
 
 import jakarta.persistence.EntityManager;
-import jakarta.persistence.TypedQuery;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;
 import sigma.application.member.outport.MemberDBPort;
diff --git a/flick-adapter/jpa/src/main/java/sigma/jpa/member/MemberJPAEntity.java b/flick-adapter/jpa/src/main/java/sigma/jpa/member/MemberJPAEntity.java
index 6e9ba5f..705737c 100644
--- a/flick-adapter/jpa/src/main/java/sigma/jpa/member/MemberJPAEntity.java
+++ b/flick-adapter/jpa/src/main/java/sigma/jpa/member/MemberJPAEntity.java
@@ -7,17 +7,17 @@
 import lombok.NoArgsConstructor;
 import lombok.experimental.SuperBuilder;
 import sigma.domain.member.model.value.Role;
-import sigma.jpa.common.entity.AbstractIdEntity;
+import sigma.jpa.common.entity.AbstractTimeEntity;
 
 @Entity
 @Table(name = "tbl_member")
 @Getter
 @SuperBuilder
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-public class MemberJPAEntity /* extends AbstractIdEntity*/ {
+public class MemberJPAEntity /* extends AbstractIdEntity*/ extends AbstractTimeEntity {
 
     @jakarta.persistence.Id
-    private String Id;
+    private String id;
 
     @NotNull
     @Enumerated(value = EnumType.STRING)
diff --git a/flick-api/build.gradle b/flick-api/build.gradle
index 3f59477..0f0dbee 100644
--- a/flick-api/build.gradle
+++ b/flick-api/build.gradle
@@ -9,5 +9,5 @@ dependencies {
 
     implementation 'org.springframework.boot:spring-boot-starter-web'
 
-    runtimeOnly 'mysql:mysql-connector-java:8.0.33'
+    runtimeOnly 'org.mariadb.jdbc:mariadb-java-client'
 }
\ No newline at end of file
diff --git a/flick-api/src/main/resources/application.yml b/flick-api/src/main/resources/application.yml
index 41f38b0..7618f57 100644
--- a/flick-api/src/main/resources/application.yml
+++ b/flick-api/src/main/resources/application.yml
@@ -3,7 +3,7 @@ server:
 
 spring:
   datasource:
-    driver-class-name: com.mysql.cj.jdbc.Driver
+    driver-class-name: org.mariadb.jdbc.Driver
     url: ${DB_URL}
     username: ${DB_USERNAME}
     password: ${DB_PASSWORD}
diff --git a/flick-core/domain/src/main/java/sigma/domain/account/model/Account.java b/flick-core/domain/src/main/java/sigma/domain/account/model/Account.java
index 729680a..3b4f9dc 100644
--- a/flick-core/domain/src/main/java/sigma/domain/account/model/Account.java
+++ b/flick-core/domain/src/main/java/sigma/domain/account/model/Account.java
@@ -5,6 +5,7 @@
 import sigma.domain.account.model.exception.NotAccountHolder;
 import sigma.domain.account.model.value.*;
 import sigma.domain.common.value.AbstractId;
+import sigma.domain.member.model.value.MemberId;
 
 import java.time.LocalDateTime;
 
@@ -32,7 +33,7 @@ public Account(final AccountId id, final AccountInfo accountInfo, final HolderId
         this.modifiedAt = modifiedAt;
     }
 
-    private void isHolder(final AbstractId memberId) {
+    private void isHolder(final MemberId memberId) {
         if (!holderId.equals(memberId)) {
             throw NotAccountHolder.EXCEPTION;
         }
@@ -44,7 +45,7 @@ private void canAfford(final Long amount) {
         }
     }
 
-    public void send(final Long amount, final AbstractId memberId) {
+    public void send(final Long amount, final MemberId memberId) {
         isHolder(memberId);
         canAfford(amount);
 
diff --git a/flick-core/domain/src/main/java/sigma/domain/account/model/value/HolderId.java b/flick-core/domain/src/main/java/sigma/domain/account/model/value/HolderId.java
index f49c3fb..8bc14e2 100644
--- a/flick-core/domain/src/main/java/sigma/domain/account/model/value/HolderId.java
+++ b/flick-core/domain/src/main/java/sigma/domain/account/model/value/HolderId.java
@@ -1,15 +1,16 @@
 package sigma.domain.account.model.value;
 
 import sigma.domain.common.value.AbstractId;
+import sigma.domain.member.model.value.MemberId;
 
-public final class HolderId extends AbstractId {
+public final class HolderId /*extends AbstractId */{
+    private final MemberId Id;
 
-    public HolderId(final Long id) {
-        super(id);
+    public HolderId(final MemberId id) {
+        this.Id = id;
     }
 
-    public HolderId(final AbstractId id) {
-        super(id.getId());
+    public String getId() {
+        return Id.getId();
     }
-
 }
\ No newline at end of file
diff --git a/flick-core/domain/src/test/java/sigma/domain/account/model/AccountTest.java b/flick-core/domain/src/test/java/sigma/domain/account/model/AccountTest.java
index 8a2ab7d..4dc25c4 100644
--- a/flick-core/domain/src/test/java/sigma/domain/account/model/AccountTest.java
+++ b/flick-core/domain/src/test/java/sigma/domain/account/model/AccountTest.java
@@ -21,7 +21,7 @@ class AccountTest {
     @BeforeEach
     void setUp() {
         final Balance balance = new Balance(1000L);
-        holderId = new HolderId(1L);
+        holderId = new HolderId(new MemberId("244fd654-891d-4cda-ba95-a96396811bc2"));
         account = Account.builder()
                 .id(new AccountId(1L))
                 .accountInfo(new AccountInfo(2317L,"최수원의 계좌"))
@@ -37,7 +37,7 @@ void setUp() {
     @Test
     @DisplayName(value = "Holder 가 아닐 경우 송금 불가")
     void HOLDER_가_아닐_경우_송금_불가() {
-        final MemberId memberId = new MemberId(3L);
+        final MemberId memberId = new MemberId("244fd654-891d-4cda-ba95-a96396811bc2");
 
         assertThrows(NotAccountHolder.class, () -> account.send(500L, memberId));
     }
@@ -45,13 +45,13 @@ void setUp() {
     @Test
     @DisplayName(value = "잔액이 부족할 경우 송금 불가")
     void 잔액이_부족할_경우_송금_불가() {
-        assertThrows(InsufficientBalance.class, () -> account.send(9999L, holderId));
+        assertThrows(InsufficientBalance.class, () -> account.send(9999L, new MemberId("244fd654-891d-4cda-ba95-a96396811bc2")));
     }
 
     @Test
     @DisplayName(value = "송금 성공")
     void 송금_성공() {
-        account.send(500L, holderId);
+        account.send(500L, new MemberId("244fd654-891d-4cda-ba95-a96396811bc2"));
 
         assertEquals(500L, account.balance().getValue());
     }