diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13dc2a49..ab402428 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## untagged
 
+- Allow ports 143 and 993 to be used by `dovecot` process
+  ([#639](https://github.com/chatmail/relay/pull/639))
+
 - dovecot: keep mailbox index only in memory to avoid unnecessary disc usage 
   ([#632](https://github.com/chatmail/relay/pull/632))