diff --git a/CHANGELOG.md b/CHANGELOG.md
index 083a765..9f2a895 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `ca-west-1` region
+
 ## 1.5.1
 
 ### Changed
diff --git a/composer.json b/composer.json
index 5ed5aa0..ae1b72e 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.5-dev"
+            "dev-master": "1.6-dev"
         }
     }
 }
diff --git a/src/EcrClient.php b/src/EcrClient.php
index b2a8525..f32e543 100644
--- a/src/EcrClient.php
+++ b/src/EcrClient.php
@@ -72,6 +72,7 @@ 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':