diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2bf00b64e..ff0a0e6b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,13 @@
 
 -->
 
+## 12.x.x (unreleased)
+
+### Improvements
+- リモートユーザーのDeleteアクティビティに対応
+
+### Bugfixes
+
 ## 12.90.1 (2021/09/05)
 
 ### Bugfixes