diff --git a/src/Index.php b/src/Index.php
index fc7584e3c..395bcde03 100644
--- a/src/Index.php
+++ b/src/Index.php
@@ -217,6 +217,8 @@ public function addDocument(Document $doc): Response
                 'retry_on_conflict',
                 'routing',
                 'timeout',
+                'if_primary_term',
+                'if_seq_no',
             ]
         );
 
diff --git a/src/Search.php b/src/Search.php
index 03911aea5..79ccaf6af 100644
--- a/src/Search.php
+++ b/src/Search.php
@@ -41,6 +41,7 @@ class Search
     public const OPTION_SHARD_REQUEST_CACHE = 'request_cache';
     public const OPTION_FILTER_PATH = 'filter_path';
     public const OPTION_TYPED_KEYS = 'typed_keys';
+    public const OPTION_SEQ_NO_PRIMARY_TERM = 'seq_no_primary_term';
 
     /*
      * Search types
@@ -419,6 +420,7 @@ protected function validateOption(string $key): void
             case self::OPTION_SHARD_REQUEST_CACHE:
             case self::OPTION_FILTER_PATH:
             case self::OPTION_TYPED_KEYS:
+            case self::OPTION_SEQ_NO_PRIMARY_TERM:
                 return;
         }