diff --git a/client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java b/client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java
index b9b3c4b31a414..a8532f6d16339 100644
--- a/client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java
+++ b/client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java
@@ -410,6 +410,8 @@ private static void addSearchRequestParams(Params params, SearchRequest searchRe
         params.withIndicesOptions(searchRequest.indicesOptions());
         params.putParam("search_type", searchRequest.searchType().name().toLowerCase(Locale.ROOT));
         params.putParam("ccs_minimize_roundtrips", Boolean.toString(searchRequest.isCcsMinimizeRoundtrips()));
+        params.putParam("pre_filter_shard_size", Integer.toString(searchRequest.getPreFilterShardSize()));
+        params.putParam("max_concurrent_shard_requests", Integer.toString(searchRequest.getMaxConcurrentShardRequests()));
         if (searchRequest.requestCache() != null) {
             params.putParam("request_cache", Boolean.toString(searchRequest.requestCache()));
         }
diff --git a/client/rest-high-level/src/test/java/org/elasticsearch/client/RequestConvertersTests.java b/client/rest-high-level/src/test/java/org/elasticsearch/client/RequestConvertersTests.java
index 4e04eb9d07d64..3e4ecda385388 100644
--- a/client/rest-high-level/src/test/java/org/elasticsearch/client/RequestConvertersTests.java
+++ b/client/rest-high-level/src/test/java/org/elasticsearch/client/RequestConvertersTests.java
@@ -1857,6 +1857,14 @@ private static void setRandomSearchParams(SearchRequest searchRequest,
             searchRequest.setCcsMinimizeRoundtrips(randomBoolean());
         }
         expectedParams.put("ccs_minimize_roundtrips", Boolean.toString(searchRequest.isCcsMinimizeRoundtrips()));
+        if (randomBoolean()) {
+            searchRequest.setMaxConcurrentShardRequests(randomIntBetween(1, Integer.MAX_VALUE));
+        }
+        expectedParams.put("max_concurrent_shard_requests", Integer.toString(searchRequest.getMaxConcurrentShardRequests()));
+        if (randomBoolean()) {
+            searchRequest.setPreFilterShardSize(randomIntBetween(2, Integer.MAX_VALUE));
+        }
+        expectedParams.put("pre_filter_shard_size", Integer.toString(searchRequest.getPreFilterShardSize()));
     }
 
     static void setRandomIndicesOptions(Consumer<IndicesOptions> setter, Supplier<IndicesOptions> getter,