diff --git a/types/express-serve-static-core/index.d.ts b/types/express-serve-static-core/index.d.ts
index 30fe69c82a..f8521d433d 100644
--- a/types/express-serve-static-core/index.d.ts
+++ b/types/express-serve-static-core/index.d.ts
@@ -707,6 +707,7 @@ export interface Response extends http.ServerResponse, Express.Response {
      */
     set(field: any): Response;
     set(field: string, value?: string): Response;
+    set(field: string, value?: string[]): Response;
 
     header(field: any): Response;
     header(field: string, value?: string): Response;