diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2626dfe2a5..015047e20a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## next release
+## 3.278.3 - 2023-08-15
 
 * `Aws\PI` - AWS Performance Insights for Amazon RDS is launching Performance Analysis On Demand, a new feature that allows you to analyze database performance metrics and find out the performance issues. You can now use SDK to create, list, get, delete, and manage tags of performance analysis reports.
 * `Aws\SageMaker` - SageMaker Inference Recommender now provides SupportedResponseMIMETypes from DescribeInferenceRecommendationsJob response
diff --git a/src/Sdk.php b/src/Sdk.php
index f23ac941e6..e4c9451608 100644
--- a/src/Sdk.php
+++ b/src/Sdk.php
@@ -711,7 +711,7 @@
  */
 class Sdk
 {
-    const VERSION = '3.278.2';
+    const VERSION = '3.278.3';
 
     /** @var array Arguments for creating clients */
     private $args;