diff --git a/CHANGELOG/CHANGELOG-1.9.md b/CHANGELOG/CHANGELOG-1.9.md
index dd6b493779a..a499e00bf1e 100644
--- a/CHANGELOG/CHANGELOG-1.9.md
+++ b/CHANGELOG/CHANGELOG-1.9.md
@@ -1,5 +1,26 @@
 # Changelog 1.9
 
+## 1.9.1 - 2023-04-11
+
+### Changed
+
+- Upgrade Antrea base image to ubuntu:22.04. ([#4459](https://github.com/antrea-io/antrea/pull/4459) [#4499](https://github.com/antrea-io/antrea/pull/4499), [@antoninbas])
+
+### Fixed
+
+- Ensure NO_FLOOD is always set for IPsec tunnel ports and TrafficControl ports. ([#4419](https://github.com/antrea-io/antrea/pull/4419) [#4654](https://github.com/antrea-io/antrea/pull/4654) [#4674](https://github.com/antrea-io/antrea/pull/4674), [@xliuxu] [@tnqn])
+- Fix Service routes being deleted on Agent startup on Windows. ([#4470](https://github.com/antrea-io/antrea/pull/4470), [@hongliangl])
+- Fix route deletion for Service ClusterIP and LoadBalancerIP when AntreaProxy is enabled. ([#4711](https://github.com/antrea-io/antrea/pull/4711), [@tnqn])
+- Fix OpenFlow Group being reused with wrong type because groupDb cache was not cleaned up. ([#4592](https://github.com/antrea-io/antrea/pull/4592), [@ceclinux])
+- Add a periodic job to rejoin dead Nodes to fix Egress not working properly after long network downtime. ([#4491](https://github.com/antrea-io/antrea/pull/4491), [@tnqn])
+- Fix Agent crash in dual-stack clusters when any Node is not configured with an IP address for each address family. ([#4480](https://github.com/antrea-io/antrea/pull/4480), [@hongliangl])
+- Fix potential deadlocks and memory leaks of memberlist maintenance in large-scale clusters. ([#4469](https://github.com/antrea-io/antrea/pull/4469), [@wenyingd])
+- Fix connectivity issues caused by MAC address changes with systemd v242 and later. ([#4428](https://github.com/antrea-io/antrea/pull/4428), [@wenyingd])
+- Fix a ClusterInfo export bug when Multi-cluster Gateway changes. ([#4412](https://github.com/antrea-io/antrea/pull/4412), [@luolanzone])
+- Fix OpenFlow rules not being updated when Multi-cluster Gateway updates. ([#4388](https://github.com/antrea-io/antrea/pull/4388), [@luolanzone])
+- Set no-flood config with ports for TrafficControl after Agent restarting. ([#4318](https://github.com/antrea-io/antrea/pull/4318), [@hongliangl])
+
+
 ## 1.9.0 - 2022-10-21
 
 ### Added