diff --git a/ChangeLog.md b/ChangeLog.md
index e7a0309b..f591b8d0 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -17,6 +17,7 @@ v5.0.2p2
     - Implement SMTP error codes as follows: `4.7.23`, `4.7.30`, and `4.7.32`
     - Shortened error message patterns to make them more adaptable to minor sentence changes.
   - Multibyte characters in the code and comments have been replaced with ASCII characters. #514
+  - Import sisimai/rb-sisimai#280 Deal the Apple unsubscribe notification as an ARF message #516
 
 v5.0.2
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