diff --git a/manifest.json b/manifest.json
index acb44e130..769cd56cd 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,6 @@
 {
     "variables": {
-        "${LATEST}": "3.342.33"
+        "${LATEST}": "3.342.35"
     },
     "endpoints": "https://raw.githubusercontent.com/aws/aws-sdk-php/${LATEST}/src/data/endpoints.json",
     "services": {
diff --git a/src/Service/XRay/CHANGELOG.md b/src/Service/XRay/CHANGELOG.md
index 75e7f0967..4abebdfed 100644
--- a/src/Service/XRay/CHANGELOG.md
+++ b/src/Service/XRay/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Added
 
 - AWS api-change: Added `eu-isoe-west-1` region
+- AWS api-change: Added `us-iso-east-1` and `us-iso-west-1` regions.
 
 ## 1.3.0
 
diff --git a/src/Service/XRay/src/XRayClient.php b/src/Service/XRay/src/XRayClient.php
index 8a1711a93..8c4be3704 100644
--- a/src/Service/XRay/src/XRayClient.php
+++ b/src/Service/XRay/src/XRayClient.php
@@ -139,6 +139,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'xray',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-iso-east-1':
+            case 'us-iso-west-1':
+                return [
+                    'endpoint' => "https://xray.$region.c2s.ic.gov",
+                    'signRegion' => $region,
+                    'signService' => 'xray',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [