diff --git a/src/OpenSearch/Endpoints/Search.php b/src/OpenSearch/Endpoints/Search.php
index 3898143d..9dc36469 100644
--- a/src/OpenSearch/Endpoints/Search.php
+++ b/src/OpenSearch/Endpoints/Search.php
@@ -78,7 +78,8 @@ public function getParamWhitelist(): array
             'batched_reduce_size',
             'max_concurrent_shard_requests',
             'pre_filter_shard_size',
-            'rest_total_hits_as_int'
+            'rest_total_hits_as_int',
+            'highlight'
         ];
     }