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+---
+layout: docs
+page_title: 0.4.x
+description: >-
+  Consul API Gateway release notes for version 0.4.x
+---
+
+# Consul API Gateway 0.4.0
+
+## Release Highlights
+
+- **Support for Kubernetes Gateway API Version 0.5.0 and v1beta1 APIs:**
+  The `v0.5.0` release of the Kubernetes Gateway API is significant because it
+  marks the growth in maturity to a beta API version (v1beta1) release for some
+  of the key APIs:
+  - GatewayClass
+  - Gateway
+  - HTTPRoute
+
+  The other APIs (e.g. TCPRoute) are still at the `v1alpha2` stage.
+
+  Reaching `v1beta1` status has several benefits for users, including greater
+  stability and backward compatibility requirements. Existing fields and allowed
+  options can not be removed or renamed except in a new, major version of the
+  API. Once an API reaches `v1beta1` status, future versions must comply with
+  several backward compatibility requirements.
+
+- **URL Path Prefix Rewrite**
+  This release introduces support for rewriting a URL's path prefix when routing
+  HTTP traffic. This is configured by adding a `URLRewrite` filter to a
+  `HTTPRoute`. With this feature, the gateway can rewrite the URL path, in a
+  client's HTTP Request, before sending the request to a service. A simple
+  example of this is changing the path from `//store/checkout` to
+  `//cart/checkout`. Please see the product documentation for details on how to
+  configure this feature.
+
+## What's Changed
+
+- **Reference Policy Renamed to Reference Grant** In v0.5.0 of the Kubernetes
+  Gateway API, `ReferencePolicy` has been renamed to `ReferenceGrant`. This
+  release supports both but `ReferencePolicy` is deprecated and will be removed
+  in a future version of the standard.
+
+  After upgrading to this version of Consul API Gateway, you should rename all
+  existing `ReferencePolicy`y to `ReferenceGrant`s. Please see the upgrading
+  instructions for additional details.
+
+## Supported Software
+
+- Consul 1.11.2+
+- HashiCorp Consul Helm chart 0.47.0+
+- Kubernetes 1.21+
+  - Kubernetes 1.24 is not supported at this time.
+- Kubectl 1.21+
+- Envoy proxy support is determined by the Consul version deployed. Refer to
+  [Envoy Integration](/docs/connect/proxies/envoy) for details.
+
+## Kubernetes Gateway API Specification
+
+Supported version of the [Gateway API](https://gateway-api.sigs.k8s.io/) spec: v0.5.0
+
+## Upgrading
+
+For detailed information on upgrading, please refer to the [Upgrades page](/docs/api-gateway/upgrades)
+
+## Changelogs
+
+The changelogs for this major release version and any maintenance versions are listed below.
+
+~> **Note:** The following link will take you to the changelogs on the GitHub website.
+
+- [0.4.0](https://github.com/hashicorp/consul-api-gateway/releases/tag/v0.4.0)
diff --git a/website/data/docs-nav-data.json b/website/data/docs-nav-data.json
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@@ -1261,6 +1261,10 @@
       {
         "title": "Consul API Gateway",
         "routes": [
+          {
+            "title": "v0.4.x",
+            "path": "release-notes/consul-api-gateway/v0_4_x"
+          },
           {
             "title": "v0.3.x",
             "path": "release-notes/consul-api-gateway/v0_3_x"