diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72300031d4..2db434dc58 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## next release
+## 3.257.6 - 2023-01-23
 
 * `Aws\EndpointV2` - Test fixes related to signing, particularly sigv4a.
 * `Aws\Lambda` - Release Lambda RuntimeManagementConfig, enabling customers to better manage runtime updates to their Lambda functions. This release adds two new APIs, GetRuntimeManagementConfig and PutRuntimeManagementConfig, as well as support on existing Create/Get/Update function APIs.
diff --git a/src/Sdk.php b/src/Sdk.php
index 18d0c804cf..e3a0784d34 100644
--- a/src/Sdk.php
+++ b/src/Sdk.php
@@ -681,7 +681,7 @@
  */
 class Sdk
 {
-    const VERSION = '3.257.5';
+    const VERSION = '3.257.6';
 
     /** @var array Arguments for creating clients */
     private $args;