diff --git a/index.d.ts b/index.d.ts
index 403fd1a..0ebd3f0 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -110,8 +110,8 @@ export interface AxiosInstance {
   };
   request<T = any>(config: AxiosRequestConfig): AxiosPromise<T>;
   get<T = any>(url: string, config?: AxiosRequestConfig): AxiosPromise<T>;
-  delete(url: string, config?: AxiosRequestConfig): AxiosPromise;
-  head(url: string, config?: AxiosRequestConfig): AxiosPromise;
+  delete<T = any>(url: string, config?: AxiosRequestConfig): AxiosPromise<T>;
+  head<T = any>(url: string, config?: AxiosRequestConfig): AxiosPromise<T>;
   post<T = any>(url: string, data?: any, config?: AxiosRequestConfig): AxiosPromise<T>;
   put<T = any>(url: string, data?: any, config?: AxiosRequestConfig): AxiosPromise<T>;
   patch<T = any>(url: string, data?: any, config?: AxiosRequestConfig): AxiosPromise<T>;