diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8ea8f9b16..fbd8f75d89 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## next release
+## 3.300.9 - 2024-03-01
 
 * `Aws\AccessAnalyzer` - Fixed a typo in description field.
 * `Aws\AutoScaling` - With this release, Amazon EC2 Auto Scaling groups, EC2 Fleet, and Spot Fleet improve the default price protection behavior of attribute-based instance type selection of Spot Instances, to consistently select from a wide range of instance types.
diff --git a/src/Sdk.php b/src/Sdk.php
index 49463d9240..62d472457d 100644
--- a/src/Sdk.php
+++ b/src/Sdk.php
@@ -763,7 +763,7 @@
  */
 class Sdk
 {
-    const VERSION = '3.300.8';
+    const VERSION = '3.300.9';
 
     /** @var array Arguments for creating clients */
     private $args;