diff --git a/src/providers.ts b/src/providers.ts
index 148820b..00caa5f 100644
--- a/src/providers.ts
+++ b/src/providers.ts
@@ -1,6 +1,6 @@
 import {Provider} from './types/providers';
 
-export const fetchProvider: Provider = (url: string, data, requestConfig: object) => {
+export const fetchProvider: Provider = (url, data, requestConfig) => {
   return fetch(url, {...requestConfig, body: JSON.stringify(data)}).then((res: any) => {
     if (!res.ok) {
       throw res.json();