diff --git a/package.json b/package.json
index d6cc8f3..61b7b20 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fakerest",
-  "version": "3.5.0",
+  "version": "4.0.0-beta.0",
   "repository": "https://github.com/marmelab/FakeRest",
   "description": "Patch XMLHttpRequest to fake a REST server based on JSON data. ",
   "scripts": {
diff --git a/src/types.ts b/src/types.ts
index 465df28..2f9752f 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,6 +1,3 @@
-import type { SinonFakeXMLHttpRequest } from 'sinon';
-import type { MockResponse } from 'fetch-mock';
-
 export type CollectionItem = { [key: string]: any };
 
 export type SortFunction = <T extends CollectionItem = CollectionItem>(