diff --git a/CHANGELOG.md b/CHANGELOG.md
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--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,68 @@
+## 1.4.0 (February 29, 2024)
+
+> NOTE: Consul K8s 1.4.x is compatible with Consul 1.18.x and Consul Dataplane 1.4.x. Refer to our [compatibility matrix](https://developer.hashicorp.com/consul/docs/k8s/compatibility) for more info.
+
+BREAKING CHANGES:
+
+* server: set `autopilot.min_quorum` to the correct quorum value to ensure autopilot doesn't prune servers needed for quorum. Also set `autopilot. disable_upgrade_migration` to `true` as that setting is meant for blue/green deploys, not rolling deploys.
+
+This setting makes sense for most use-cases, however if you had a specific reason to use the old settings you can use the following config to keep them:
+
+    server:
+      extraConfig: |
+        {"autopilot": {"min_quorum": 0, "disable_upgrade_migration": false}} [[GH-3000](https://github.com/hashicorp/consul-k8s/issues/3000)]
+* server: set `leave_on_terminate` to `true` and set the server pod disruption budget `maxUnavailable` to `1`.
+
+This change makes server rollouts faster and more reliable. However, there is now a potential for reduced reliability if users accidentally
+scale the statefulset down. Now servers will leave the raft pool when they are stopped gracefully which reduces the fault
+tolerance. For example, with 5 servers, you can tolerate a loss of 2 servers' data as raft guarantees data is replicated to
+a majority of nodes (3). However, if you accidentally scale the statefulset down to 3, then the raft quorum will now be 2, and
+if you lose 2 servers, you may lose data. Before this change, the quorum would have remained at 3.
+
+During a regular rollout, the number of servers will be reduced by 1 at a time, which doesn't affect quorum when running
+an odd number of servers, e.g. quorum for 5 servers is 3, and quorum for 4 servers is also 3. That's why the pod disruption
+budget is being set to 1 now.
+
+If a server is stopped ungracefully, e.g. due to a node loss, it will not leave the raft pool, and so fault tolerance won't be affected.
+
+For the vast majority of users, this change will be beneficial, however if you wish to remain with the old settings you
+can set:
+
+    server:
+      extraConfig: |
+        {"leave_on_terminate": false}
+      disruptionBudget:
+        maxUnavailable: <previous setting> [[GH-3000](https://github.com/hashicorp/consul-k8s/issues/3000)]
+
+SECURITY:
+
+* Update Envoy version to 1.25.11 to address [CVE-2023-44487](https://github.com/envoyproxy/envoy/security/advisories/GHSA-jhv4-f7mr-xx76) [[GH-3116](https://github.com/hashicorp/consul-k8s/issues/3116)]
+* Upgrade `helm/v3` to 3.11.3. This resolves the following security vulnerabilities:
+[CVE-2023-25165](https://osv.dev/vulnerability/CVE-2023-25165)
+[CVE-2022-23524](https://osv.dev/vulnerability/CVE-2022-23524)
+[CVE-2022-23526](https://osv.dev/vulnerability/CVE-2022-23526)
+[CVE-2022-23525](https://osv.dev/vulnerability/CVE-2022-23525) [[GH-3625](https://github.com/hashicorp/consul-k8s/issues/3625)]
+* Upgrade docker/distribution to 2.8.3+incompatible (latest) to resolve [CVE-2023-2253](https://osv.dev/vulnerability/CVE-2023-2253). [[GH-3625](https://github.com/hashicorp/consul-k8s/issues/3625)]
+* Upgrade docker/docker to 25.0.3+incompatible (latest) to resolve [GHSA-jq35-85cj-fj4p](https://osv.dev/vulnerability/GHSA-jq35-85cj-fj4p). [[GH-3625](https://github.com/hashicorp/consul-k8s/issues/3625)]
+* Upgrade filepath-securejoin to 0.2.4 (latest) to resolve [GO-2023-2048](https://osv.dev/vulnerability/GO-2023-2048). [[GH-3625](https://github.com/hashicorp/consul-k8s/issues/3625)]
+* Upgrade containerd to 1.7.13 (latest) to resolve [GHSA-7ww5-4wqc-m92c](https://osv.dev/vulnerability/GO-2023-2412). [[GH-3625](https://github.com/hashicorp/consul-k8s/issues/3625)]
+
+IMPROVEMENTS:
+
+* control-plane: publish `consul-k8s-control-plane` and `consul-k8s-control-plane-fips` images to official HashiCorp AWS ECR. [[GH-3668](https://github.com/hashicorp/consul-k8s/issues/3668)]
+* helm: Kubernetes v1.29 is now supported. Minimum tested version of Kubernetes is now v1.26. [[GH-3675](https://github.com/hashicorp/consul-k8s/issues/3675)]
+* cni: When CNI is enabled, set ReadOnlyRootFilesystem=true and AllowPrivilegeEscalation=false for mesh pod init containers and AllowPrivilegeEscalation=false for consul-dataplane containers (ReadOnlyRootFilesystem was already true for consul-dataplane containers). [[GH-3498](https://github.com/hashicorp/consul-k8s/issues/3498)]
+* control-plane: Add `CaseInsensitive` flag to service-routers that allows paths and path prefixes to ignore URL upper and lower casing. [[GH-3502](https://github.com/hashicorp/consul-k8s/issues/3502)]
+
+BUG FIXES:
+
+* consul-telemetry-collector: fix args to consul-dataplane when global.acls.manageSystemACLs [[GH-3184](https://github.com/hashicorp/consul-k8s/issues/3184)]
+
+NOTES:
+
+* build: Releases will now also be available as Debian and RPM packages for the arm64 architecture, refer to the
+[Official Packaging Guide](https://www.hashicorp.com/official-packaging-guide) for more information. [[GH-3428](https://github.com/hashicorp/consul-k8s/issues/3428)]
+
 ## 1.3.3 (February 15, 2024)
 
 FEATURES: