diff --git a/app/posts/repository.py b/app/posts/repository.py
index 12668cb..87c8ce9 100644
--- a/app/posts/repository.py
+++ b/app/posts/repository.py
@@ -133,9 +133,13 @@ async def update_post(
         post.description = description
         post.category = category
         post.tags = tags
-        post.images = images
 
+        # 새 이미지들을 세션에 추가
+        self.session.add_all(images)
         await self.session.flush()
+
+        # images 관계를 다시 로드
+        await self.session.refresh(post, ["images"])
         return post
 
     async def save_post_images(