diff --git a/manifest.json b/manifest.json
index 87c9da9e1..7c395380a 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,6 @@
 {
     "variables": {
-        "${LATEST}": "3.342.26"
+        "${LATEST}": "3.342.28"
     },
     "endpoints": "https://raw.githubusercontent.com/aws/aws-sdk-php/${LATEST}/src/data/endpoints.json",
     "services": {
diff --git a/src/Service/Athena/CHANGELOG.md b/src/Service/Athena/CHANGELOG.md
index 2f5c30654..6fb59f376 100644
--- a/src/Service/Athena/CHANGELOG.md
+++ b/src/Service/Athena/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Added
 
 - AWS api-change: Added `eu-isoe-west-1` region
+- AWS api-change: rewrite declaration of regions
 
 ## 3.2.0
 
diff --git a/src/Service/Athena/src/AthenaClient.php b/src/Service/Athena/src/AthenaClient.php
index 8f79b3bb0..e64f70097 100644
--- a/src/Service/Athena/src/AthenaClient.php
+++ b/src/Service/Athena/src/AthenaClient.php
@@ -59,7 +59,6 @@
 use AsyncAws\Core\AwsError\AwsErrorFactoryInterface;
 use AsyncAws\Core\AwsError\JsonRpcAwsErrorFactory;
 use AsyncAws\Core\Configuration;
-use AsyncAws\Core\Exception\UnsupportedRegion;
 use AsyncAws\Core\RequestContext;
 
 class AthenaClient extends AbstractApi
@@ -703,44 +702,6 @@ protected function getEndpointMetadata(?string $region): array
         }
 
         switch ($region) {
-            case 'af-south-1':
-            case 'ap-east-1':
-            case 'ap-northeast-1':
-            case 'ap-northeast-2':
-            case 'ap-northeast-3':
-            case 'ap-south-1':
-            case 'ap-south-2':
-            case 'ap-southeast-1':
-            case 'ap-southeast-2':
-            case 'ap-southeast-3':
-            case 'ap-southeast-4':
-            case 'ap-southeast-5':
-            case 'ca-central-1':
-            case 'ca-west-1':
-            case 'eu-central-1':
-            case 'eu-central-2':
-            case 'eu-north-1':
-            case 'eu-south-1':
-            case 'eu-south-2':
-            case 'eu-west-1':
-            case 'eu-west-2':
-            case 'eu-west-3':
-            case 'il-central-1':
-            case 'me-central-1':
-            case 'me-south-1':
-            case 'sa-east-1':
-            case 'us-east-1':
-            case 'us-east-2':
-            case 'us-gov-east-1':
-            case 'us-gov-west-1':
-            case 'us-west-1':
-            case 'us-west-2':
-                return [
-                    'endpoint' => "https://athena.$region.amazonaws.com",
-                    'signRegion' => $region,
-                    'signService' => 'athena',
-                    'signVersions' => ['v4'],
-                ];
             case 'cn-north-1':
             case 'cn-northwest-1':
                 return [
@@ -829,6 +790,11 @@ protected function getEndpointMetadata(?string $region): array
                 ];
         }
 
-        throw new UnsupportedRegion(\sprintf('The region "%s" is not supported by "Athena".', $region));
+        return [
+            'endpoint' => "https://athena.$region.amazonaws.com",
+            'signRegion' => $region,
+            'signService' => 'athena',
+            'signVersions' => ['v4'],
+        ];
     }
 }
diff --git a/src/Service/Kinesis/CHANGELOG.md b/src/Service/Kinesis/CHANGELOG.md
index 829384ad6..851a8ec04 100644
--- a/src/Service/Kinesis/CHANGELOG.md
+++ b/src/Service/Kinesis/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: added `eu-isoe-west-1` region
+
 ### Changed
 
 - Sort exception alphabetically.
diff --git a/src/Service/Kinesis/composer.json b/src/Service/Kinesis/composer.json
index 85db2c6df..55bbeffb2 100644
--- a/src/Service/Kinesis/composer.json
+++ b/src/Service/Kinesis/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "3.2-dev"
+            "dev-master": "3.3-dev"
         }
     }
 }
diff --git a/src/Service/Kinesis/src/KinesisClient.php b/src/Service/Kinesis/src/KinesisClient.php
index 996035f06..be7aea6f2 100644
--- a/src/Service/Kinesis/src/KinesisClient.php
+++ b/src/Service/Kinesis/src/KinesisClient.php
@@ -1633,6 +1633,13 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'kinesis',
                     'signVersions' => ['v4'],
                 ];
+            case 'eu-isoe-west-1':
+                return [
+                    'endpoint' => 'https://kinesis.eu-isoe-west-1.cloud.adc-e.uk',
+                    'signRegion' => 'eu-isoe-west-1',
+                    'signService' => 'kinesis',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isob-east-1':
                 return [
                     'endpoint' => 'https://kinesis.us-isob-east-1.sc2s.sgov.gov',
diff --git a/src/Service/SecretsManager/CHANGELOG.md b/src/Service/SecretsManager/CHANGELOG.md
index cbd864d38..eacfff846 100644
--- a/src/Service/SecretsManager/CHANGELOG.md
+++ b/src/Service/SecretsManager/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: added `eu-isoe-west-1` region
+
 ### Changed
 
 - Sort exception alphabetically.
diff --git a/src/Service/SecretsManager/composer.json b/src/Service/SecretsManager/composer.json
index 8f7d5fc0e..1d4fb2478 100644
--- a/src/Service/SecretsManager/composer.json
+++ b/src/Service/SecretsManager/composer.json
@@ -29,7 +29,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.7-dev"
+            "dev-master": "2.8-dev"
         }
     }
 }
diff --git a/src/Service/SecretsManager/src/SecretsManagerClient.php b/src/Service/SecretsManager/src/SecretsManagerClient.php
index 710a8bcea..f686080a5 100644
--- a/src/Service/SecretsManager/src/SecretsManagerClient.php
+++ b/src/Service/SecretsManager/src/SecretsManagerClient.php
@@ -572,6 +572,13 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'secretsmanager',
                     'signVersions' => ['v4'],
                 ];
+            case 'eu-isoe-west-1':
+                return [
+                    'endpoint' => 'https://secretsmanager.eu-isoe-west-1.cloud.adc-e.uk',
+                    'signRegion' => 'eu-isoe-west-1',
+                    'signService' => 'secretsmanager',
+                    'signVersions' => ['v4'],
+                ];
         }
 
         throw new UnsupportedRegion(\sprintf('The region "%s" is not supported by "SecretsManager".', $region));