diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b5565045b..b3e2a11f6c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## next release
+## 3.300.4 - 2024-02-23
 
 * `Aws\QLDB` - Clarify possible values for KmsKeyArn and EncryptionDescription.
 * `Aws\CloudWatchRUM` - Doc-only update for new RUM metrics that were added
diff --git a/src/Sdk.php b/src/Sdk.php
index 277fae7021..ade6d12f28 100644
--- a/src/Sdk.php
+++ b/src/Sdk.php
@@ -763,7 +763,7 @@
  */
 class Sdk
 {
-    const VERSION = '3.300.3';
+    const VERSION = '3.300.4';
 
     /** @var array Arguments for creating clients */
     private $args;