diff --git a/CHANGELOG.md b/CHANGELOG.md
index dbb2c13..30bf878 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Added
 
 - AWS api-change: Added `fips-us-iso-east-1` region
+- AWS api-change: Added `ca-west-1` and `fips-ca-west-1` regions
 
 ## 2.1.0
 
diff --git a/src/S3Client.php b/src/S3Client.php
index fda98e1..3887610 100644
--- a/src/S3Client.php
+++ b/src/S3Client.php
@@ -2936,6 +2936,7 @@ protected function getEndpointMetadata(?string $region): array
             case 'ap-southeast-3':
             case 'ap-southeast-4':
             case 'ca-central-1':
+            case 'ca-west-1':
             case 'eu-central-1':
             case 'eu-central-2':
             case 'eu-north-1':
@@ -2982,6 +2983,13 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 's3',
                     'signVersions' => ['s3v4'],
                 ];
+            case 'fips-ca-west-1':
+                return [
+                    'endpoint' => 'https://s3-fips.ca-west-1.amazonaws.com',
+                    'signRegion' => 'ca-west-1',
+                    'signService' => 's3',
+                    'signVersions' => ['s3v4'],
+                ];
             case 'fips-us-east-1':
                 return [
                     'endpoint' => 'https://s3-fips.us-east-1.amazonaws.com',