diff --git a/types/query-string/index.d.ts b/types/query-string/index.d.ts
index 6e560f57e9..3eaf34c159 100644
--- a/types/query-string/index.d.ts
+++ b/types/query-string/index.d.ts
@@ -1,10 +1,11 @@
-// Type definitions for query-string 6.1
+// Type definitions for query-string 6.2
 // Project: https://github.com/sindresorhus/query-string
 // Definitions by: Sam Verschueren <https://github.com/SamVerschueren>
 //                 Tanguy Krotoff <https://github.com/tkrotoff>
 //                 HuHuanming <https://github.com/huhuanming>
 //                 Madara Uchiha <https://github.com/MadaraUchiha>
 //                 Josh Holmer <https://github.com/shssoichiro>
+//                 Simon Van den Broeck <https://github.com/jarrku>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.2
 
@@ -33,6 +34,7 @@ export interface StringifyOptions {
     strict?: boolean;
     encode?: boolean;
     arrayFormat?: 'bracket' | 'index' | 'none';
+    sort?: ((m: string, n: string) => boolean) | boolean;
 }
 
 /**