diff --git a/manifest.json b/manifest.json
index cb30fea12..7505d66c2 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,6 @@
 {
     "variables": {
-        "${LATEST}": "3.342.19"
+        "${LATEST}": "3.342.20"
     },
     "endpoints": "https://raw.githubusercontent.com/aws/aws-sdk-php/${LATEST}/src/data/endpoints.json",
     "services": {
diff --git a/src/Service/AppSync/CHANGELOG.md b/src/Service/AppSync/CHANGELOG.md
index ff7c11bb5..15b023aa1 100644
--- a/src/Service/AppSync/CHANGELOG.md
+++ b/src/Service/AppSync/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Rework regions configuration
+
 ## 3.1.1
 
 ### Changed
diff --git a/src/Service/AppSync/composer.json b/src/Service/AppSync/composer.json
index 56e1bea6a..4d488d524 100644
--- a/src/Service/AppSync/composer.json
+++ b/src/Service/AppSync/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "3.1-dev"
+            "dev-master": "3.2-dev"
         }
     }
 }
diff --git a/src/Service/AppSync/src/AppSyncClient.php b/src/Service/AppSync/src/AppSyncClient.php
index e4b2e7ec2..ca535ed1c 100644
--- a/src/Service/AppSync/src/AppSyncClient.php
+++ b/src/Service/AppSync/src/AppSyncClient.php
@@ -46,6 +46,7 @@
 use AsyncAws\Core\AwsError\AwsErrorFactoryInterface;
 use AsyncAws\Core\AwsError\JsonRestAwsErrorFactory;
 use AsyncAws\Core\Configuration;
+use AsyncAws\Core\Exception\UnsupportedRegion;
 use AsyncAws\Core\RequestContext;
 
 class AppSyncClient extends AbstractApi
@@ -395,6 +396,40 @@ protected function getEndpointMetadata(?string $region): array
         }
 
         switch ($region) {
+            case 'af-south-1':
+            case 'ap-east-1':
+            case 'ap-northeast-1':
+            case 'ap-northeast-2':
+            case 'ap-northeast-3':
+            case 'ap-south-1':
+            case 'ap-south-2':
+            case 'ap-southeast-1':
+            case 'ap-southeast-2':
+            case 'ap-southeast-3':
+            case 'ap-southeast-4':
+            case 'ca-central-1':
+            case 'eu-central-1':
+            case 'eu-central-2':
+            case 'eu-north-1':
+            case 'eu-south-1':
+            case 'eu-south-2':
+            case 'eu-west-1':
+            case 'eu-west-2':
+            case 'eu-west-3':
+            case 'il-central-1':
+            case 'me-central-1':
+            case 'me-south-1':
+            case 'sa-east-1':
+            case 'us-east-1':
+            case 'us-east-2':
+            case 'us-west-1':
+            case 'us-west-2':
+                return [
+                    'endpoint' => "https://appsync.$region.amazonaws.com",
+                    'signRegion' => $region,
+                    'signService' => 'appsync',
+                    'signVersions' => ['v4'],
+                ];
             case 'cn-north-1':
             case 'cn-northwest-1':
                 return [
@@ -405,11 +440,6 @@ protected function getEndpointMetadata(?string $region): array
                 ];
         }
 
-        return [
-            'endpoint' => "https://appsync.$region.amazonaws.com",
-            'signRegion' => $region,
-            'signService' => 'appsync',
-            'signVersions' => ['v4'],
-        ];
+        throw new UnsupportedRegion(\sprintf('The region "%s" is not supported by "AppSync".', $region));
     }
 }
diff --git a/src/Service/Route53/CHANGELOG.md b/src/Service/Route53/CHANGELOG.md
index d9633999b..d663a6010 100644
--- a/src/Service/Route53/CHANGELOG.md
+++ b/src/Service/Route53/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added us-gov-east-1 and us-gov-west-1 as valid Latency Based Routing regions for change-resource-record-sets.
+
 ## 2.8.0
 
 ### Added
diff --git a/src/Service/Route53/composer.json b/src/Service/Route53/composer.json
index 432589625..8e268d34a 100644
--- a/src/Service/Route53/composer.json
+++ b/src/Service/Route53/composer.json
@@ -29,7 +29,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.8-dev"
+            "dev-master": "2.9-dev"
         }
     }
 }
diff --git a/src/Service/Route53/src/Enum/ResourceRecordSetRegion.php b/src/Service/Route53/src/Enum/ResourceRecordSetRegion.php
index ae440acc0..48e9021b3 100644
--- a/src/Service/Route53/src/Enum/ResourceRecordSetRegion.php
+++ b/src/Service/Route53/src/Enum/ResourceRecordSetRegion.php
@@ -36,6 +36,8 @@ final class ResourceRecordSetRegion
     public const SA_EAST_1 = 'sa-east-1';
     public const US_EAST_1 = 'us-east-1';
     public const US_EAST_2 = 'us-east-2';
+    public const US_GOV_EAST_1 = 'us-gov-east-1';
+    public const US_GOV_WEST_1 = 'us-gov-west-1';
     public const US_WEST_1 = 'us-west-1';
     public const US_WEST_2 = 'us-west-2';
 
@@ -74,6 +76,8 @@ public static function exists(string $value): bool
             self::SA_EAST_1 => true,
             self::US_EAST_1 => true,
             self::US_EAST_2 => true,
+            self::US_GOV_EAST_1 => true,
+            self::US_GOV_WEST_1 => true,
             self::US_WEST_1 => true,
             self::US_WEST_2 => true,
         ][$value]);
diff --git a/src/Service/Ses/CHANGELOG.md b/src/Service/Ses/CHANGELOG.md
index 425d0e4f7..c07ec8222 100644
--- a/src/Service/Ses/CHANGELOG.md
+++ b/src/Service/Ses/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: This release enables customers to provide attachments in the SESv2 SendEmail and SendBulkEmail APIs.
+
 ## 1.11.0
 
 ### Added
diff --git a/src/Service/Ses/composer.json b/src/Service/Ses/composer.json
index 3500aef48..98cff2a42 100644
--- a/src/Service/Ses/composer.json
+++ b/src/Service/Ses/composer.json
@@ -27,7 +27,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.11-dev"
+            "dev-master": "1.12-dev"
         }
     }
 }
diff --git a/src/Service/Ses/src/Enum/AttachmentContentDisposition.php b/src/Service/Ses/src/Enum/AttachmentContentDisposition.php
new file mode 100644
index 000000000..2e0a8c6a5
--- /dev/null
+++ b/src/Service/Ses/src/Enum/AttachmentContentDisposition.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace AsyncAws\Ses\Enum;
+
+final class AttachmentContentDisposition
+{
+    public const ATTACHMENT = 'ATTACHMENT';
+    public const INLINE = 'INLINE';
+
+    public static function exists(string $value): bool
+    {
+        return isset([
+            self::ATTACHMENT => true,
+            self::INLINE => true,
+        ][$value]);
+    }
+}
diff --git a/src/Service/Ses/src/Enum/AttachmentContentTransferEncoding.php b/src/Service/Ses/src/Enum/AttachmentContentTransferEncoding.php
new file mode 100644
index 000000000..859923454
--- /dev/null
+++ b/src/Service/Ses/src/Enum/AttachmentContentTransferEncoding.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace AsyncAws\Ses\Enum;
+
+final class AttachmentContentTransferEncoding
+{
+    public const BASE64 = 'BASE64';
+    public const QUOTED_PRINTABLE = 'QUOTED_PRINTABLE';
+    public const SEVEN_BIT = 'SEVEN_BIT';
+
+    public static function exists(string $value): bool
+    {
+        return isset([
+            self::BASE64 => true,
+            self::QUOTED_PRINTABLE => true,
+            self::SEVEN_BIT => true,
+        ][$value]);
+    }
+}
diff --git a/src/Service/Ses/src/ValueObject/Attachment.php b/src/Service/Ses/src/ValueObject/Attachment.php
new file mode 100644
index 000000000..fb0e5246c
--- /dev/null
+++ b/src/Service/Ses/src/ValueObject/Attachment.php
@@ -0,0 +1,192 @@
+<?php
+
+namespace AsyncAws\Ses\ValueObject;
+
+use AsyncAws\Core\Exception\InvalidArgument;
+use AsyncAws\Ses\Enum\AttachmentContentDisposition;
+use AsyncAws\Ses\Enum\AttachmentContentTransferEncoding;
+
+/**
+ * Contains metadata and attachment raw content.
+ */
+final class Attachment
+{
+    /**
+     * The raw data of the attachment. It needs to be base64-encoded if you are accessing Amazon SES directly through the
+     * HTTPS interface. If you are accessing Amazon SES using an Amazon Web Services SDK, the SDK takes care of the base
+     * 64-encoding for you.
+     *
+     * @var string
+     */
+    private $rawContent;
+
+    /**
+     * A standard descriptor indicating how the attachment should be rendered in the email. Supported values: `ATTACHMENT`
+     * or `INLINE`.
+     *
+     * @var AttachmentContentDisposition::*|null
+     */
+    private $contentDisposition;
+
+    /**
+     * The file name for the attachment as it will appear in the email. Amazon SES restricts certain file extensions. To
+     * ensure attachments are accepted, check the Unsupported attachment types [^1] in the Amazon SES Developer Guide.
+     *
+     * [^1]: https://docs.aws.amazon.com/ses/latest/dg/mime-types.html
+     *
+     * @var string
+     */
+    private $fileName;
+
+    /**
+     * A brief description of the attachment content.
+     *
+     * @var string|null
+     */
+    private $contentDescription;
+
+    /**
+     * Unique identifier for the attachment, used for referencing attachments with INLINE disposition in HTML content.
+     *
+     * @var string|null
+     */
+    private $contentId;
+
+    /**
+     * Specifies how the attachment is encoded. Supported values: `BASE64`, `QUOTED_PRINTABLE`, `SEVEN_BIT`.
+     *
+     * @var AttachmentContentTransferEncoding::*|null
+     */
+    private $contentTransferEncoding;
+
+    /**
+     * The MIME type of the attachment.
+     *
+     * > Example: `application/pdf`, `image/jpeg`
+     *
+     * @var string|null
+     */
+    private $contentType;
+
+    /**
+     * @param array{
+     *   RawContent: string,
+     *   ContentDisposition?: null|AttachmentContentDisposition::*,
+     *   FileName: string,
+     *   ContentDescription?: null|string,
+     *   ContentId?: null|string,
+     *   ContentTransferEncoding?: null|AttachmentContentTransferEncoding::*,
+     *   ContentType?: null|string,
+     * } $input
+     */
+    public function __construct(array $input)
+    {
+        $this->rawContent = $input['RawContent'] ?? $this->throwException(new InvalidArgument('Missing required field "RawContent".'));
+        $this->contentDisposition = $input['ContentDisposition'] ?? null;
+        $this->fileName = $input['FileName'] ?? $this->throwException(new InvalidArgument('Missing required field "FileName".'));
+        $this->contentDescription = $input['ContentDescription'] ?? null;
+        $this->contentId = $input['ContentId'] ?? null;
+        $this->contentTransferEncoding = $input['ContentTransferEncoding'] ?? null;
+        $this->contentType = $input['ContentType'] ?? null;
+    }
+
+    /**
+     * @param array{
+     *   RawContent: string,
+     *   ContentDisposition?: null|AttachmentContentDisposition::*,
+     *   FileName: string,
+     *   ContentDescription?: null|string,
+     *   ContentId?: null|string,
+     *   ContentTransferEncoding?: null|AttachmentContentTransferEncoding::*,
+     *   ContentType?: null|string,
+     * }|Attachment $input
+     */
+    public static function create($input): self
+    {
+        return $input instanceof self ? $input : new self($input);
+    }
+
+    public function getContentDescription(): ?string
+    {
+        return $this->contentDescription;
+    }
+
+    /**
+     * @return AttachmentContentDisposition::*|null
+     */
+    public function getContentDisposition(): ?string
+    {
+        return $this->contentDisposition;
+    }
+
+    public function getContentId(): ?string
+    {
+        return $this->contentId;
+    }
+
+    /**
+     * @return AttachmentContentTransferEncoding::*|null
+     */
+    public function getContentTransferEncoding(): ?string
+    {
+        return $this->contentTransferEncoding;
+    }
+
+    public function getContentType(): ?string
+    {
+        return $this->contentType;
+    }
+
+    public function getFileName(): string
+    {
+        return $this->fileName;
+    }
+
+    public function getRawContent(): string
+    {
+        return $this->rawContent;
+    }
+
+    /**
+     * @internal
+     */
+    public function requestBody(): array
+    {
+        $payload = [];
+        $v = $this->rawContent;
+        $payload['RawContent'] = base64_encode($v);
+        if (null !== $v = $this->contentDisposition) {
+            if (!AttachmentContentDisposition::exists($v)) {
+                throw new InvalidArgument(\sprintf('Invalid parameter "ContentDisposition" for "%s". The value "%s" is not a valid "AttachmentContentDisposition".', __CLASS__, $v));
+            }
+            $payload['ContentDisposition'] = $v;
+        }
+        $v = $this->fileName;
+        $payload['FileName'] = $v;
+        if (null !== $v = $this->contentDescription) {
+            $payload['ContentDescription'] = $v;
+        }
+        if (null !== $v = $this->contentId) {
+            $payload['ContentId'] = $v;
+        }
+        if (null !== $v = $this->contentTransferEncoding) {
+            if (!AttachmentContentTransferEncoding::exists($v)) {
+                throw new InvalidArgument(\sprintf('Invalid parameter "ContentTransferEncoding" for "%s". The value "%s" is not a valid "AttachmentContentTransferEncoding".', __CLASS__, $v));
+            }
+            $payload['ContentTransferEncoding'] = $v;
+        }
+        if (null !== $v = $this->contentType) {
+            $payload['ContentType'] = $v;
+        }
+
+        return $payload;
+    }
+
+    /**
+     * @return never
+     */
+    private function throwException(\Throwable $exception)
+    {
+        throw $exception;
+    }
+}
diff --git a/src/Service/Ses/src/ValueObject/EmailContent.php b/src/Service/Ses/src/ValueObject/EmailContent.php
index 5185afd22..f0d4c9cfc 100644
--- a/src/Service/Ses/src/ValueObject/EmailContent.php
+++ b/src/Service/Ses/src/ValueObject/EmailContent.php
@@ -3,15 +3,15 @@
 namespace AsyncAws\Ses\ValueObject;
 
 /**
- * An object that defines the entire content of the email, including the message headers and the body content. You can
- * create a simple email message, in which you specify the subject and the text and HTML versions of the message body.
- * You can also create raw messages, in which you specify a complete MIME-formatted message. Raw messages can include
- * attachments and custom headers.
+ * An object that defines the entire content of the email, including the message headers, body content, and attachments.
+ * For a simple email message, you specify the subject and provide both text and HTML versions of the message body. You
+ * can also add attachments to simple and templated messages. For a raw message, you provide a complete MIME-formatted
+ * message, which can include custom headers and attachments.
  */
 final class EmailContent
 {
     /**
-     * The simple email message. The message consists of a subject and a message body.
+     * The simple email message. The message consists of a subject, message body and attachments list.
      *
      * @var Message|null
      */
diff --git a/src/Service/Ses/src/ValueObject/Message.php b/src/Service/Ses/src/ValueObject/Message.php
index 9f81600aa..17547952d 100644
--- a/src/Service/Ses/src/ValueObject/Message.php
+++ b/src/Service/Ses/src/ValueObject/Message.php
@@ -33,11 +33,19 @@ final class Message
      */
     private $headers;
 
+    /**
+     * The List of attachments to include in your email. All recipients will receive the same attachments.
+     *
+     * @var Attachment[]|null
+     */
+    private $attachments;
+
     /**
      * @param array{
      *   Subject: Content|array,
      *   Body: Body|array,
      *   Headers?: null|array<MessageHeader|array>,
+     *   Attachments?: null|array<Attachment|array>,
      * } $input
      */
     public function __construct(array $input)
@@ -45,6 +53,7 @@ public function __construct(array $input)
         $this->subject = isset($input['Subject']) ? Content::create($input['Subject']) : $this->throwException(new InvalidArgument('Missing required field "Subject".'));
         $this->body = isset($input['Body']) ? Body::create($input['Body']) : $this->throwException(new InvalidArgument('Missing required field "Body".'));
         $this->headers = isset($input['Headers']) ? array_map([MessageHeader::class, 'create'], $input['Headers']) : null;
+        $this->attachments = isset($input['Attachments']) ? array_map([Attachment::class, 'create'], $input['Attachments']) : null;
     }
 
     /**
@@ -52,6 +61,7 @@ public function __construct(array $input)
      *   Subject: Content|array,
      *   Body: Body|array,
      *   Headers?: null|array<MessageHeader|array>,
+     *   Attachments?: null|array<Attachment|array>,
      * }|Message $input
      */
     public static function create($input): self
@@ -59,6 +69,14 @@ public static function create($input): self
         return $input instanceof self ? $input : new self($input);
     }
 
+    /**
+     * @return Attachment[]
+     */
+    public function getAttachments(): array
+    {
+        return $this->attachments ?? [];
+    }
+
     public function getBody(): Body
     {
         return $this->body;
@@ -95,6 +113,14 @@ public function requestBody(): array
                 $payload['Headers'][$index] = $listValue->requestBody();
             }
         }
+        if (null !== $v = $this->attachments) {
+            $index = -1;
+            $payload['Attachments'] = [];
+            foreach ($v as $listValue) {
+                ++$index;
+                $payload['Attachments'][$index] = $listValue->requestBody();
+            }
+        }
 
         return $payload;
     }
diff --git a/src/Service/Ses/src/ValueObject/Template.php b/src/Service/Ses/src/ValueObject/Template.php
index ba3c4001d..15e5302ae 100644
--- a/src/Service/Ses/src/ValueObject/Template.php
+++ b/src/Service/Ses/src/ValueObject/Template.php
@@ -51,6 +51,13 @@ final class Template
      */
     private $headers;
 
+    /**
+     * The List of attachments to include in your email. All recipients will receive the same attachments.
+     *
+     * @var Attachment[]|null
+     */
+    private $attachments;
+
     /**
      * @param array{
      *   TemplateName?: null|string,
@@ -58,6 +65,7 @@ final class Template
      *   TemplateContent?: null|EmailTemplateContent|array,
      *   TemplateData?: null|string,
      *   Headers?: null|array<MessageHeader|array>,
+     *   Attachments?: null|array<Attachment|array>,
      * } $input
      */
     public function __construct(array $input)
@@ -67,6 +75,7 @@ public function __construct(array $input)
         $this->templateContent = isset($input['TemplateContent']) ? EmailTemplateContent::create($input['TemplateContent']) : null;
         $this->templateData = $input['TemplateData'] ?? null;
         $this->headers = isset($input['Headers']) ? array_map([MessageHeader::class, 'create'], $input['Headers']) : null;
+        $this->attachments = isset($input['Attachments']) ? array_map([Attachment::class, 'create'], $input['Attachments']) : null;
     }
 
     /**
@@ -76,6 +85,7 @@ public function __construct(array $input)
      *   TemplateContent?: null|EmailTemplateContent|array,
      *   TemplateData?: null|string,
      *   Headers?: null|array<MessageHeader|array>,
+     *   Attachments?: null|array<Attachment|array>,
      * }|Template $input
      */
     public static function create($input): self
@@ -83,6 +93,14 @@ public static function create($input): self
         return $input instanceof self ? $input : new self($input);
     }
 
+    /**
+     * @return Attachment[]
+     */
+    public function getAttachments(): array
+    {
+        return $this->attachments ?? [];
+    }
+
     /**
      * @return MessageHeader[]
      */
@@ -137,6 +155,14 @@ public function requestBody(): array
                 $payload['Headers'][$index] = $listValue->requestBody();
             }
         }
+        if (null !== $v = $this->attachments) {
+            $index = -1;
+            $payload['Attachments'] = [];
+            foreach ($v as $listValue) {
+                ++$index;
+                $payload['Attachments'][$index] = $listValue->requestBody();
+            }
+        }
 
         return $payload;
     }