diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d13aa88fe..6083f2f210 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## next release
+## 3.278.2 - 2023-08-14
 
 * `Aws\Omics` - This release provides support for annotation store versioning and cross account sharing for Omics Analytics
 * `Aws\MediaPackage` - Fix SDK logging of certain fields.
diff --git a/src/Sdk.php b/src/Sdk.php
index e9636b9a48..f23ac941e6 100644
--- a/src/Sdk.php
+++ b/src/Sdk.php
@@ -711,7 +711,7 @@
  */
 class Sdk
 {
-    const VERSION = '3.278.1';
+    const VERSION = '3.278.2';
 
     /** @var array Arguments for creating clients */
     private $args;