diff --git a/manifest.json b/manifest.json
index feb6e22d5..274b82c01 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,6 @@
 {
     "variables": {
-        "${LATEST}": "3.342.15"
+        "${LATEST}": "3.342.16"
     },
     "endpoints": "https://raw.githubusercontent.com/aws/aws-sdk-php/${LATEST}/src/data/endpoints.json",
     "services": {
diff --git a/src/Service/CodeBuild/CHANGELOG.md b/src/Service/CodeBuild/CHANGELOG.md
index 499f40e31..83c7c082f 100644
--- a/src/Service/CodeBuild/CHANGELOG.md
+++ b/src/Service/CodeBuild/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: This release adds support for cacheNamespace in ProjectCache
+
 ### Changed
 
 - AWS enhancement: Documentation updates.
diff --git a/src/Service/CodeBuild/composer.json b/src/Service/CodeBuild/composer.json
index 3b796166b..418bb1515 100644
--- a/src/Service/CodeBuild/composer.json
+++ b/src/Service/CodeBuild/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.8-dev"
+            "dev-master": "2.9-dev"
         }
     }
 }
diff --git a/src/Service/CodeBuild/src/Result/BatchGetBuildsOutput.php b/src/Service/CodeBuild/src/Result/BatchGetBuildsOutput.php
index 482db3f35..e0f51b321 100644
--- a/src/Service/CodeBuild/src/Result/BatchGetBuildsOutput.php
+++ b/src/Service/CodeBuild/src/Result/BatchGetBuildsOutput.php
@@ -353,6 +353,7 @@ private function populateResultProjectCache(array $json): ProjectCache
             'type' => (string) $json['type'],
             'location' => isset($json['location']) ? (string) $json['location'] : null,
             'modes' => !isset($json['modes']) ? null : $this->populateResultProjectCacheModes($json['modes']),
+            'cacheNamespace' => isset($json['cacheNamespace']) ? (string) $json['cacheNamespace'] : null,
         ]);
     }
 
diff --git a/src/Service/CodeBuild/src/Result/StartBuildOutput.php b/src/Service/CodeBuild/src/Result/StartBuildOutput.php
index e9c5b05d8..233d94c50 100644
--- a/src/Service/CodeBuild/src/Result/StartBuildOutput.php
+++ b/src/Service/CodeBuild/src/Result/StartBuildOutput.php
@@ -303,6 +303,7 @@ private function populateResultProjectCache(array $json): ProjectCache
             'type' => (string) $json['type'],
             'location' => isset($json['location']) ? (string) $json['location'] : null,
             'modes' => !isset($json['modes']) ? null : $this->populateResultProjectCacheModes($json['modes']),
+            'cacheNamespace' => isset($json['cacheNamespace']) ? (string) $json['cacheNamespace'] : null,
         ]);
     }
 
diff --git a/src/Service/CodeBuild/src/Result/StopBuildOutput.php b/src/Service/CodeBuild/src/Result/StopBuildOutput.php
index 39f8d9e42..945e924bd 100644
--- a/src/Service/CodeBuild/src/Result/StopBuildOutput.php
+++ b/src/Service/CodeBuild/src/Result/StopBuildOutput.php
@@ -303,6 +303,7 @@ private function populateResultProjectCache(array $json): ProjectCache
             'type' => (string) $json['type'],
             'location' => isset($json['location']) ? (string) $json['location'] : null,
             'modes' => !isset($json['modes']) ? null : $this->populateResultProjectCacheModes($json['modes']),
+            'cacheNamespace' => isset($json['cacheNamespace']) ? (string) $json['cacheNamespace'] : null,
         ]);
     }
 
diff --git a/src/Service/CodeBuild/src/ValueObject/ProjectCache.php b/src/Service/CodeBuild/src/ValueObject/ProjectCache.php
index bfd29f4ee..ca6432589 100644
--- a/src/Service/CodeBuild/src/ValueObject/ProjectCache.php
+++ b/src/Service/CodeBuild/src/ValueObject/ProjectCache.php
@@ -68,11 +68,22 @@ final class ProjectCache
      */
     private $modes;
 
+    /**
+     * Defines the scope of the cache. You can use this namespace to share a cache across multiple projects. For more
+     * information, see Cache sharing between projects [^1] in the *CodeBuild User Guide*.
+     *
+     * [^1]: https://docs.aws.amazon.com/codebuild/latest/userguide/caching-s3.html#caching-s3-sharing
+     *
+     * @var string|null
+     */
+    private $cacheNamespace;
+
     /**
      * @param array{
      *   type: CacheType::*,
      *   location?: null|string,
      *   modes?: null|array<CacheMode::*>,
+     *   cacheNamespace?: null|string,
      * } $input
      */
     public function __construct(array $input)
@@ -80,6 +91,7 @@ public function __construct(array $input)
         $this->type = $input['type'] ?? $this->throwException(new InvalidArgument('Missing required field "type".'));
         $this->location = $input['location'] ?? null;
         $this->modes = $input['modes'] ?? null;
+        $this->cacheNamespace = $input['cacheNamespace'] ?? null;
     }
 
     /**
@@ -87,6 +99,7 @@ public function __construct(array $input)
      *   type: CacheType::*,
      *   location?: null|string,
      *   modes?: null|array<CacheMode::*>,
+     *   cacheNamespace?: null|string,
      * }|ProjectCache $input
      */
     public static function create($input): self
@@ -94,6 +107,11 @@ public static function create($input): self
         return $input instanceof self ? $input : new self($input);
     }
 
+    public function getCacheNamespace(): ?string
+    {
+        return $this->cacheNamespace;
+    }
+
     public function getLocation(): ?string
     {
         return $this->location;
@@ -140,6 +158,9 @@ public function requestBody(): array
                 $payload['modes'][$index] = $listValue;
             }
         }
+        if (null !== $v = $this->cacheNamespace) {
+            $payload['cacheNamespace'] = $v;
+        }
 
         return $payload;
     }