diff --git a/types/slimerjs/index.d.ts b/types/slimerjs/index.d.ts
index e92503f47e..2a1d8e3847 100644
--- a/types/slimerjs/index.d.ts
+++ b/types/slimerjs/index.d.ts
@@ -43,7 +43,12 @@ interface IPhantom {
     onError: (msg: string, trace: string[]) => any;
 }
 
-interface ISystem {
+interface IStd {
+    read(): any;
+    write(arg: any): void;
+}
+
+interface ISystemModule {
     pid: number;
     platform: string;
     os: {
@@ -53,6 +58,12 @@ interface ISystem {
     };
     env: { [name: string]: string; };
     args: string[];
+    standarderr: IStd;
+    standardin: IStd;
+    standardout: IStd;
+    stdout: IStd;
+    stderr: IStd;
+    stdin: IStd;
 }
 
 interface IHttpConf {
@@ -301,11 +312,15 @@ interface IStream {
     writeLine(data: string): void;
 }
 
-interface IWebServer {
+interface IWebServerModule {
+    registerDirectory(urlpath: string, directoryPath: string): void;
+    registerFile(urlpath: string, filePath: string): void;
+    registerPathHandler(urlpath: string, handlerCallback: (request: IWebServerRequest, response: IWebServerResponse) => void): void
     port: number;
     listen(port: number, cb?: (request: IWebServerRequest, response: IWebServerResponse) => void): boolean;
     listen(ipAddressPort: string, cb?: (request: IWebServerRequest, response: IWebServerResponse) => void): boolean;
     close(): void;
+
 }
 
 interface IWebServerRequest {
@@ -353,7 +368,11 @@ interface ICookie {
     expiry: number
 }
 
-declare module "webpage" {
-    export function create(): IWebPage;
-    export function exit(returnValue?: number): void;
+interface IWebPageModule {
+  create(): IWebPage;
+  exit(returnValue?: number): void;
 }
+
+declare function require(module: "webpage"): IWebPageModule;
+declare function require(module: "webserver"): IWebServerModule;
+declare function require(module: "system"): ISystemModule;
diff --git a/types/slimerjs/slimerjs-tests.ts b/types/slimerjs/slimerjs-tests.ts
index 3e11b5174b..51af247e87 100644
--- a/types/slimerjs/slimerjs-tests.ts
+++ b/types/slimerjs/slimerjs-tests.ts
@@ -1,7 +1,20 @@
-import webpagemod = require('webpage')
-let page = webpagemod.create();
+var webpageMod = require('webpage');
+var webserverMod = require('webserver')
+
+let page = webpageMod.create();
 let vUrl = 'https://www.w3c.org';
 
+
+function testWebserver () {
+
+  webserverMod.close()
+  webserverMod.listen(1234);
+  webserverMod.registerFile("urlPath", "filePath");
+  webserverMod.registerDirectory("urlPath", "dirPath");
+
+}
+
+
 let vUserAgent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/602.4.8 (KHTML, like Gecko) Version/10.0.3 Safari/602.4.8'
 page.settings.userAgent = vUserAgent;