diff --git a/CHANGELOG.md b/CHANGELOG.md
index add9125..651c47a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `fips-ca-central-1` and `fips-ca-west-1` regions.
+
 ### Changed
 
 - Enable compiler optimization for the `sprintf` function.
diff --git a/composer.json b/composer.json
index 24ee5f0..e31e8a4 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.2-dev"
+            "dev-master": "2.3-dev"
         }
     }
 }
diff --git a/src/AthenaClient.php b/src/AthenaClient.php
index 32e19be..e14dce1 100644
--- a/src/AthenaClient.php
+++ b/src/AthenaClient.php
@@ -748,6 +748,20 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'athena',
                     'signVersions' => ['v4'],
                 ];
+            case 'fips-ca-central-1':
+                return [
+                    'endpoint' => 'https://athena-fips.ca-central-1.amazonaws.com',
+                    'signRegion' => 'ca-central-1',
+                    'signService' => 'athena',
+                    'signVersions' => ['v4'],
+                ];
+            case 'fips-ca-west-1':
+                return [
+                    'endpoint' => 'https://athena-fips.ca-west-1.amazonaws.com',
+                    'signRegion' => 'ca-west-1',
+                    'signService' => 'athena',
+                    'signVersions' => ['v4'],
+                ];
             case 'fips-us-east-1':
                 return [
                     'endpoint' => 'https://athena-fips.us-east-1.amazonaws.com',