diff --git a/src/main/java/org/websoso/WSSServer/application/LibraryEvaluationApplication.java b/src/main/java/org/websoso/WSSServer/application/LibraryEvaluationApplication.java
index bd46de95..f1ce2a66 100644
--- a/src/main/java/org/websoso/WSSServer/application/LibraryEvaluationApplication.java
+++ b/src/main/java/org/websoso/WSSServer/application/LibraryEvaluationApplication.java
@@ -3,7 +3,6 @@
 import static org.websoso.WSSServer.exception.error.CustomUserNovelError.NOT_EVALUATED;
 import static org.websoso.WSSServer.exception.error.CustomUserNovelError.USER_NOVEL_ALREADY_EXISTS;
 
-import jakarta.transaction.Transactional;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -13,6 +12,7 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import org.websoso.WSSServer.user.domain.User;
 import org.websoso.WSSServer.dto.keyword.KeywordGetResponse;
 import org.websoso.WSSServer.dto.userNovel.UserNovelCreateRequest;
@@ -108,6 +108,7 @@ public void updateEvaluation(User user, Long novelId, UserNovelUpdateRequest req
      * @param user    사용자 객체
      * @param novelId 소설 ID
      */
+    @Transactional
     public void deleteEvaluation(User user, Long novelId) {
         UserNovel userNovel = libraryService.getLibraryOrException(user, novelId);
 
diff --git a/src/main/java/org/websoso/WSSServer/application/LibraryInterestApplication.java b/src/main/java/org/websoso/WSSServer/application/LibraryInterestApplication.java
index 49260426..d2e14d3c 100644
--- a/src/main/java/org/websoso/WSSServer/application/LibraryInterestApplication.java
+++ b/src/main/java/org/websoso/WSSServer/application/LibraryInterestApplication.java
@@ -7,6 +7,7 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import org.websoso.WSSServer.user.domain.User;
 import org.websoso.WSSServer.exception.exception.CustomUserNovelException;
 import org.websoso.WSSServer.library.domain.UserNovel;
@@ -27,6 +28,7 @@ public class LibraryInterestApplication {
      * @param user    사용자 객체
      * @param novelId 소설 ID
      */
+    @Transactional
     public void registerAsInterest(User user, Long novelId) {
         Novel novel = novelService.getNovelOrException(novelId);
 
@@ -53,6 +55,7 @@ public void registerAsInterest(User user, Long novelId) {
      * @param user    사용자 객체
      * @param novelId 소설 ID
      */
+    @Transactional
     public void unregisterAsInterest(User user, Long novelId) {
         UserNovel userNovel = libraryService.getLibraryOrException(user, novelId);