diff --git a/index.d.ts b/index.d.ts
index 96e5877..1e78099 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -177,6 +177,7 @@ declare namespace Pjax {
       requestUrl?: string;
       requestMethod?: string;
       requestParams?: IRequestParams[];
+      formData?: FormData;
     }
   }