diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..5446842
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,37 @@
+import FakeXMLHttpRequest from "fake-xml-http-request";
+import { Params, QueryParams } from "route-recognizer";
+type SetupCallback = (this: Server) => void;
+interface SetupConfig {
+  forcePassthrough: boolean;
+}
+export type Config = SetupCallback | SetupConfig;
+export class Server {
+  // HTTP request verbs
+  public get: RequestHandler;
+  public put: RequestHandler;
+  public post: RequestHandler;
+  public patch: RequestHandler;
+  public delete: RequestHandler;
+  public options: RequestHandler;
+  public head: RequestHandler;
+  constructor(setup?: SetupCallback);
+
+  public shutdown(): void;
+}
+
+export type RequestHandler = (
+  urlExpression: string,
+  response: ResponseHandler,
+  async?: boolean
+) => void;
+
+export type ResponseData = [number, { [k: string]: string }, string];
+interface ExtraRequestData {
+  params: Params;
+  queryParams: QueryParams;
+}
+export type ResponseHandler = (
+  request: FakeXMLHttpRequest | ExtraRequestData
+) => ResponseData | PromiseLike<ResponseData>;
+
+export default Server;
diff --git a/package.json b/package.json
index c387802..fcdc2e7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pretender",
-  "version": "1.6.1",
+  "version": "2.0.0",
   "main": "./pretender.js",
   "license": "MIT",
   "scripts": {
@@ -34,7 +34,7 @@
     "sinon": "^3.2.1"
   },
   "dependencies": {
-    "fake-xml-http-request": "^1.6.0",
+    "fake-xml-http-request": "^2.0.0",
     "route-recognizer": "^0.3.3"
   },
   "jspm": {