diff --git a/docs/release-notes/breaking-changes.md b/docs/release-notes/breaking-changes.md
index 9202308f2..774b2c545 100644
--- a/docs/release-notes/breaking-changes.md
+++ b/docs/release-notes/breaking-changes.md
@@ -16,7 +16,9 @@ Breaking changes can impact your Elastic applications, potentially disrupting no
 % **Action**<br> Steps for mitigating deprecation impact.
 % ::::
 
-% ## 9.0.0 [elasticsearch-php-client-900-breaking-changes]
+## 9.0.0 [elasticsearch-php-client-900-breaking-changes]
+
+_No breaking changes_
 
 % ::::{dropdown} Title of breaking change
 % Description of the breaking change.
diff --git a/docs/release-notes/deprecations.md b/docs/release-notes/deprecations.md
index c50dc568e..c162007b1 100644
--- a/docs/release-notes/deprecations.md
+++ b/docs/release-notes/deprecations.md
@@ -16,7 +16,9 @@ Review the deprecated functionality for Elasticsearch PHP Client. While deprecat
 % **Action**<br> Steps for mitigating deprecation impact.
 % ::::
 
-% ## 9.0.0 [elasticsearch-php-client-900-deprecations]
+## 9.0.0 [elasticsearch-php-client-900-deprecations]
+
+_No deprecations_
 
 % Description of the deprecation and steps to update implementation.
 % For more information, check [PR #](PR link).
diff --git a/docs/release-notes/index.md b/docs/release-notes/index.md
index e6188e712..cb492f66c 100644
--- a/docs/release-notes/index.md
+++ b/docs/release-notes/index.md
@@ -24,4 +24,12 @@ To check for security updates, go to [Security announcements for the Elastic sta
 
 ### Features and enhancements [elasticsearch-php-client-900-features-enhancements]
 
-### Fixes [elasticsearch-php-client-900-fixes]
\ No newline at end of file
+- **Compatibility with Elasticsearch 9.0:** All changes and additions to Elasticsearch APIs for its 9.0 release are reflected in this release.
+- **Serverless client merged in:** the `elastic/elasticsearch-serverless` client is being deprecated, and its functionality has been merged back into this client. This should have zero impact on the way the client works by default. If an endpoint is available in serverless, the PHP function will contains a `@group serverless` phpdoc attribute.
+If you try to use an endpoint that is not available in serverless you will get a `410` HTTP error with a message as follows:
+"this endpoint exists but is not available when running in serverless mode".
+- **New transport library with PSR-18 cURL client as default:** we've removed the Guzzle dependency from the client. By default, the built-in cURL-based HTTP client will be used if no other PSR-18 compatible clients are detected. See release [9.0.0](https://github.com/elastic/elastic-transport-php/releases/tag/v9.0.0) of elastic-transport-php.
+
+### Fixes [elasticsearch-php-client-900-fixes]
+
+- **Fixed PHPStan array shape:** we fixed the array shape definition for all the endpoints, upgrading PHPStan to verion 2.1. See PR [#1439](https://github.com/elastic/elasticsearch-php/pull/1439)
\ No newline at end of file
diff --git a/docs/release-notes/known-issues.md b/docs/release-notes/known-issues.md
index 0dbe65ef5..8a6af7b29 100644
--- a/docs/release-notes/known-issues.md
+++ b/docs/release-notes/known-issues.md
@@ -5,6 +5,10 @@ navigation_title: "Known issues"
 
 # Elasticsearch PHP Client known issues [elasticsearch-php-client-known-issues]
 
+## 9.0.0 
+
+_No known issues_
+
 % Use the following template to add entries to this page.
 
 % :::{dropdown} Title of known issue