diff --git a/CHANGELOG.md b/CHANGELOG.md
index c63d738..f827e00 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Added
 
 - AWS api-change: AWS CodeBuild now supports using Secrets Manager to store git credentials and using multiple source credentials in a single project.
+- AWS api-change: Add `MacArm` environment type
 
 ### Changed
 
diff --git a/src/Enum/EnvironmentType.php b/src/Enum/EnvironmentType.php
index ef30b2b..137412a 100644
--- a/src/Enum/EnvironmentType.php
+++ b/src/Enum/EnvironmentType.php
@@ -9,6 +9,7 @@ final class EnvironmentType
     public const LINUX_CONTAINER = 'LINUX_CONTAINER';
     public const LINUX_GPU_CONTAINER = 'LINUX_GPU_CONTAINER';
     public const LINUX_LAMBDA_CONTAINER = 'LINUX_LAMBDA_CONTAINER';
+    public const MAC_ARM = 'MAC_ARM';
     public const WINDOWS_CONTAINER = 'WINDOWS_CONTAINER';
     public const WINDOWS_SERVER_2019_CONTAINER = 'WINDOWS_SERVER_2019_CONTAINER';
 
@@ -20,6 +21,7 @@ public static function exists(string $value): bool
             self::LINUX_CONTAINER => true,
             self::LINUX_GPU_CONTAINER => true,
             self::LINUX_LAMBDA_CONTAINER => true,
+            self::MAC_ARM => true,
             self::WINDOWS_CONTAINER => true,
             self::WINDOWS_SERVER_2019_CONTAINER => true,
         ][$value]);