diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..2f398b3
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,125 @@
+declare module 'mock-http-server' {
+  import { KeyObject } from 'crypto';
+  import { ClientRequest } from 'http';
+  import { Socket } from 'net';
+
+  export interface Request extends ClientRequest {
+    body?: any;
+  }
+
+  export interface HttpConfig {
+    host: string;
+    port: number;
+  }
+
+  export interface HttpsConfig extends HttpConfig {
+    key: string | Buffer | Array<Buffer | KeyObject>;
+    cert: string | Buffer | Array<Buffer | KeyObject>;
+  }
+
+  type Callback = (error?: Error) => any;
+
+  type SyncReplyFn<T> = (request: Request) => T;
+  type AsyncReplyFn<T> = (request: Request, cb: (value: T) => void) => void;
+
+  export interface ReplyOptions {
+    /**
+     * HTTP response status.
+     */
+    status?: number | SyncReplyFn<number>;
+    /**
+     * HTTP response headers. content-length is managed by the server implementation.
+     */
+    headers?: {
+      [key: string]: string;
+    };
+    /**
+     * HTTP response headers to override to default headers (ie. content-length).
+     * If a value is set to undefined, the header gets removed from the response.
+     */
+    headersOverrides?: {
+      [key: string]: string;
+    };
+    /**
+     * HTTP response body.
+     */
+    body?: string | SyncReplyFn<string> | AsyncReplyFn<string>;
+    /**
+     * End the response once the body has been sent (default behaviour). If false,
+     * it will keep the response connection open indefinitely (useful to test special
+     * cases on the client side - ie. read timeout after partial body response sent).
+     */
+    end?: boolean;
+  }
+
+  export interface OnRequestOptions {
+    /**
+     * HTTP method to match. Can be * to match any method.
+     */
+    method?: string;
+    /**
+     * HTTP request path to match. Can be * to match any path
+     * (to be used in conjunction with filter to allow custom matching)
+     */
+    path: string;
+    /**
+     * If it returns true the handler gets executed.
+     */
+    filter?: (request: Request) => boolean;
+    reply?: ReplyOptions;
+  }
+
+  export default class ServerMock {
+    /**
+     * Create a new ServerMock
+     * @param httpConfig Optional, if you want to start a HTTP server
+     * @param httpsConfig Optional, if you want to start a HTTPS server
+     */
+    constructor(httpConfig: HttpConfig, httpsConfig?: HttpsConfig);
+    /**
+     * Starts the server and invokes the callback once ready to accept connections.
+     */
+    start: (callback: Callback) => void;
+    /**
+     * Stops the server and invokes the callback once all resources have been released.
+     */
+    stop: (callback: Callback) => void;
+    /**
+     * Defines a request handler. Multiple calls to on() can be chained together.
+     */
+    on: (handler: OnRequestOptions) => void;
+    /**
+     * Returns an array containing all requests received. If filter is defined, it
+     * allows to filter requests by method, path, or both.
+     */
+    requests: (filter?: { method?: string; path?: string }) => [Request];
+    /**
+     * Returns an array containing all active connections.
+     */
+    connections: () => [Socket];
+    /**
+     * Returns the port at which the HTTP server is listening to or null otherwise. This
+     * may be useful if you configure the HTTP server port to 0 which means the operating
+     * system will assign an arbitrary unused port.
+     */
+    getHttpPort: () => number;
+    /**
+     * Returns the port at which the HTTPS server is listening to or null otherwise. This
+     * may be useful if you configure the HTTPS server port to 0 which means the operating
+     * system will assign an arbitrary unused port.
+     */
+    getHttpsPort: () => number;
+    /**
+     * Clears request handlers and requests received by the HTTP server.
+     */
+    reset: () => void;
+    /**
+     * Clears all request handlers that were previously set using on() method.
+     */
+    resetHandlers: () => void;
+    /**
+     * Clears all requests received by the HTTP server.
+     */
+    resetRequests: () => void;
+  }
+}
diff --git a/package.json b/package.json
index 640a1d6..9f5570f 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "1.4.2",
   "description": "Controllable HTTP Server Mock for your functional tests",
   "main": "index.js",
+  "types": "index.d.ts",
   "scripts": {
     "test": "./node_modules/.bin/jasmine"
   },