diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b1fb9f..8d8b396 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 ## NOT RELEASED
 
+## 1.1.1
+
+### Fixed
+
+- Fix invalid signature in SES client because of wrong Scoped Service.
+
 ## 1.1.0
 
 ### Deprecation
diff --git a/src/SesClient.php b/src/SesClient.php
index f9dd7be..63c9f4a 100644
--- a/src/SesClient.php
+++ b/src/SesClient.php
@@ -51,21 +51,21 @@ protected function getEndpointMetadata(?string $region): array
                 return [
                     'endpoint' => "https://email.$region.amazonaws.com",
                     'signRegion' => $region,
-                    'signService' => 'email',
+                    'signService' => 'ses',
                     'signVersions' => ['v4'],
                 ];
             case 'us-gov-west-1':
                 return [
                     'endpoint' => "https://email.$region.amazonaws.com",
                     'signRegion' => $region,
-                    'signService' => 'email',
+                    'signService' => 'ses',
                     'signVersions' => ['v4'],
                 ];
             case 'fips-us-gov-west-1':
                 return [
                     'endpoint' => 'https://email-fips.us-gov-west-1.amazonaws.com',
                     'signRegion' => 'us-gov-west-1',
-                    'signService' => 'email',
+                    'signService' => 'ses',
                     'signVersions' => ['v4'],
                 ];
         }