diff --git a/src/main/kotlin/wanijo/wanijo2/domain/handler/AssignTaggingHandler.kt b/src/main/kotlin/wanijo/wanijo2/domain/handler/AssignTaggingHandler.kt
index 56f43e8..3eaa258 100644
--- a/src/main/kotlin/wanijo/wanijo2/domain/handler/AssignTaggingHandler.kt
+++ b/src/main/kotlin/wanijo/wanijo2/domain/handler/AssignTaggingHandler.kt
@@ -1,6 +1,7 @@
 package wanijo.wanijo2.domain.handler
 
 import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
 import wanijo.wanijo2.domain.DocumentDao
 import wanijo.wanijo2.domain.DocumentTagging
 import wanijo.wanijo2.domain.DocumentTaggingDao
@@ -13,6 +14,7 @@ class AssignTaggingHandler(
     val documentDao: DocumentDao
 ) {
 
+    @Transactional
     fun exec(command: AssignTaggingCommand) {
         taggingDao.save(
             DocumentTagging.between(
diff --git a/src/main/kotlin/wanijo/wanijo2/domain/handler/DeleteTaggingHandler.kt b/src/main/kotlin/wanijo/wanijo2/domain/handler/DeleteTaggingHandler.kt
index 1b75946..062c1b2 100644
--- a/src/main/kotlin/wanijo/wanijo2/domain/handler/DeleteTaggingHandler.kt
+++ b/src/main/kotlin/wanijo/wanijo2/domain/handler/DeleteTaggingHandler.kt
@@ -1,6 +1,7 @@
 package wanijo.wanijo2.domain.handler
 
 import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
 import wanijo.wanijo2.domain.DocumentDao
 import wanijo.wanijo2.domain.DocumentTaggingDao
 import wanijo.wanijo2.domain.event.DeleteTaggingCommand
@@ -12,6 +13,7 @@ class DeleteTaggingHandler(
     val documentDao: DocumentDao
 ) {
 
+    @Transactional
     fun exec(command: DeleteTaggingCommand) {
         taggingDao.delete(
             command.documentId,