diff --git a/rumqttc/CHANGELOG.md b/rumqttc/CHANGELOG.md
index d5971b2a1..b693c2272 100644
--- a/rumqttc/CHANGELOG.md
+++ b/rumqttc/CHANGELOG.md
@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * use `Framed` to encode/decode MQTT packets.
 * use `Login` to store credentials
 * Made `DisconnectProperties` struct public.
+* Replace `Vec<Option<u16>>` with `FixedBitSet` for managing packet ids of released QoS 2 publishes and incoming QoS 2 publishes in `MqttState`.
 
 ### Deprecated