diff --git a/types/algoliasearch/algoliasearch-tests.ts b/types/algoliasearch/algoliasearch-tests.ts
index fa6e29dbab..4c68a75831 100644
--- a/types/algoliasearch/algoliasearch-tests.ts
+++ b/types/algoliasearch/algoliasearch-tests.ts
@@ -207,6 +207,11 @@ browser.on('error', function onError(err) {
 
 browser.stop();
 
+index.setSettings({ hitsPerPage: 10 }, () => {})
+index.setSettings({ hitsPerPage: 10 }, { forwardToReplicas: true }, () => {})
+index.setSettings({ hitsPerPage: 10 }).then(() => {})
+index.setSettings({ hitsPerPage: 10 }, { forwardToReplicas: true }).then(() => {})
+
 index.browse("", {
   advancedSyntax: false,
   attributesToRetrieve: ['dogs']
diff --git a/types/algoliasearch/index.d.ts b/types/algoliasearch/index.d.ts
index 86cedc9b93..8c32304c9e 100644
--- a/types/algoliasearch/index.d.ts
+++ b/types/algoliasearch/index.d.ts
@@ -7,6 +7,7 @@
 //                 Kai Eichinger <https://github.com/keichinger>
 //                 Nery Ortez <https://github.com/neryortez>
 //                 Antoine Rousseau <https://github.com/antoinerousseau>
+//                 Luca Pasquale <https://github.com/lucapasquale>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -359,6 +360,15 @@ declare namespace algoliasearch {
       settings: IndexSettings,
       cb: (err: Error, res: Task) => void
     ): void;
+    /**
+     * Set an index settings
+     * https://github.com/algolia/algoliasearch-client-js#set-settings---setsettings
+     */
+    setSettings(
+      settings: IndexSettings,
+      extra: { forwardToReplicas: boolean },
+      cb: (err: Error, res: Task) => void
+    ): void;
     /**
      * Clear cache of an index
      * https://github.com/algolia/algoliasearch-client-js#cache
@@ -587,7 +597,7 @@ declare namespace algoliasearch {
      * Set an index settings
      * https://github.com/algolia/algoliasearch-client-js#set-settings---setsettings
      */
-    setSettings(settings: IndexSettings): Promise<Task>;
+    setSettings(settings: IndexSettings, extra?: { forwardToReplicas: boolean }): Promise<Task>;
     /**
      * Search in an index
      * https://github.com/algolia/algoliasearch-client-js#search-in-an-index---search