diff --git a/openapi.yaml b/openapi.yaml
index 896e31d088a3fea388c23c93bdb0f615445a3fa4..0adef2bc36abc17118a004f8091fceabe31671ee 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -104,6 +104,8 @@ components:
           enum: [0, 1, 2, 3, 4]
         content:
           type: string
+        is_changed:
+          type: boolean
         is_archived:
           type: boolean
         author: