diff --git a/backend/feature/post/src/framework/web/update_post_handler.rs b/backend/feature/post/src/framework/web/update_post_handler.rs
index 62a5857..d9cdb81 100644
--- a/backend/feature/post/src/framework/web/update_post_handler.rs
+++ b/backend/feature/post/src/framework/web/update_post_handler.rs
@@ -13,6 +13,7 @@ use crate::adapter::delivery::{
     summary = "Update a post by ID",
     responses(
         (status = 200, body = PostResponseDto),
+        (status = 404, description = "Post not found"),
     ),
     security(
         ("oauth2" = [])