diff --git a/src/Builder/ClientBuilder.php b/src/Builder/ClientBuilder.php
index 87c543d..b2e36db 100644
--- a/src/Builder/ClientBuilder.php
+++ b/src/Builder/ClientBuilder.php
@@ -28,8 +28,26 @@ public function build(array $indexOptions): Client
         $client = \OpenSearch\ClientBuilder::create();
         $client->setHosts($indexOptions['index']['hosts']);
 
-        if (!empty($indexOptions['index']['credentials']['username']) && $indexOptions['index']['credentials']['password']) {
-            $client->setBasicAuthentication($indexOptions['index']['credentials']['username'], $indexOptions['index']['credentials']['password']);
+        $credentials = $indexOptions['index']['credentials'];
+
+        if (!empty($credentials['username']) && $credentials['password']) {
+            $client->setBasicAuthentication($credentials['username'], $credentials['password']);
+        } else {
+            if (!empty($credentials['sig_v4_region'])) {
+                $client->setSigV4Region($credentials['sig_v4_region']);
+            }
+
+            if (!empty($credentials['sig_v4_service'])) {
+                $client->setSigV4Service($credentials['sig_v4_service']);
+            }
+
+            if ($credentials['sig_v4_credential_provider'] !== null) {
+                $client->setSigV4CredentialProvider($credentials['sig_v4_credential_provider']);
+            }
+        }
+
+        if ($credentials['ssl_verification'] !== null) {
+            $client->setSSLVerification($credentials['ssl_verification']);
         }
 
         return $client->build();
diff --git a/src/Provider/OpenSearchIndexProvider.php b/src/Provider/OpenSearchIndexProvider.php
index a6190ae..19c152c 100644
--- a/src/Provider/OpenSearchIndexProvider.php
+++ b/src/Provider/OpenSearchIndexProvider.php
@@ -13,6 +13,7 @@
 
 namespace DsOpenSearchBundle\Provider;
 
+use Aws\Credentials\CredentialsInterface;
 use DsOpenSearchBundle\Builder\ClientBuilderInterface;
 use DsOpenSearchBundle\DsOpenSearchBundle;
 use DsOpenSearchBundle\Service\IndexPersistenceService;
@@ -48,10 +49,23 @@ public static function configureOptions(OptionsResolver $resolver): void
                         $spoolResolver->setDefaults([
                             'username' => null,
                             'password' => null,
+                            'ssl_verification' => null,
+                            'sig_v4_region' => null,
+                            'sig_v4_credential_provider' => null,
                         ]);
 
                         $spoolResolver->setAllowedTypes('username', ['string', 'null']);
                         $spoolResolver->setAllowedTypes('password', ['string', 'null']);
+                        $spoolResolver->setAllowedTypes('ssl_verification', ['bool', 'string', 'null']);
+                        $spoolResolver->setAllowedTypes('sig_v4_region', ['string', 'null']);
+                        $spoolResolver->setAllowedTypes('sig_v4_service', ['string', 'null']);
+                        $spoolResolver->setAllowedTypes('sig_v4_credential_provider', [
+                            'array',
+                            'bool',
+                            'callable',
+                            CredentialsInterface::class,
+                            'null'
+                        ]);
                     },
                 ]);