diff --git a/Definitions/jquery-1.8.d.ts b/Definitions/jquery-1.8.d.ts
index 549e683e9..597fbd065 100644
--- a/Definitions/jquery-1.8.d.ts
+++ b/Definitions/jquery-1.8.d.ts
@@ -1,3 +1,18 @@
+/* *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
 // Typing for the jQuery library, version 1.7.x
 
 /*
@@ -19,7 +34,7 @@ interface JQueryAjaxSettings {
     dataType?: string;
     error?(jqXHR: JQueryXHR, textStatus: string, errorThrow: string): any;
     global?: bool;
-    headers?: { [key: any]: any; };
+    headers?: { [key: string]: any; };
     ifModified?: bool;
     isLocal?: bool;
     jsonp?: string;
@@ -28,7 +43,7 @@ interface JQueryAjaxSettings {
     password?: string;
     processData?: bool;
     scriptCharset?: string;
-    statusCode?: { [key: any]: any; };
+    statusCode?: { [key: string]: any; };
     success?(data: any, textStatus: string, jqXHR: JQueryXHR);
     timeout?: number;
     traditional?: bool;
@@ -36,7 +51,7 @@ interface JQueryAjaxSettings {
     url?: string;
     username?: string;
     xhr?: any;
-    xhrFields?: { [key: any]: any; };
+    xhrFields?: { [key: string]: any; };
 }
 
 /*
@@ -152,6 +167,7 @@ interface JQueryStatic {
     /****
      AJAX
     *****/
+    ajax(settings: JQueryAjaxSettings);
     ajax(url: string, settings: JQueryAjaxSettings);
 
     ajaxPrefilter(dataTypes: string, handler: (opts: any, originalOpts: any, jqXHR: JQueryXHR) => any): any;
@@ -195,7 +211,7 @@ interface JQueryStatic {
     ****/
     css(e: any, propertyName: string, value?: any);
     css(e: any, propertyName: any, value?: any);
-    cssHooks: { [key: any]: any; };
+    cssHooks: { [key: string]: any; };
 
     /****
      DATA
@@ -314,7 +330,7 @@ interface JQuery {
 
     attr(attributeName: string): string;
     attr(attributeName: string, value: any): JQuery;
-    attr(map: { [key: any]: any; }): JQuery;
+    attr(map: { [key: string]: any; }): JQuery;
     attr(attributeName: string, func: (index: any, attr: any) => any): JQuery;
 
     hasClass(className: string): bool;
@@ -699,4 +715,4 @@ interface JQuery {
 }
 
 declare var jQuery: JQueryStatic;
-declare var $: JQueryStatic;
\ No newline at end of file
+declare var $: JQueryStatic;
diff --git a/Definitions/node-0.8.d.ts b/Definitions/node-0.8.d.ts
index 09efec7bc..baae95cbe 100644
--- a/Definitions/node-0.8.d.ts
+++ b/Definitions/node-0.8.d.ts
@@ -772,10 +772,10 @@ declare module "fs" {
     export function writeSync(fd: string, buffer: NodeBuffer, offset: number, length: number, position: number): void;
     export function read(fd: string, buffer: NodeBuffer, offset: number, length: number, position: number, callback?: (err: Error, bytesRead: number, buffer: NodeBuffer) => void): void;
     export function readSync(fd: string, buffer: NodeBuffer, offset: number, length: number, position: number): any[];
-    export function readFile(filename: string, encoding: string, callback: (err: Error, data: NodeBuffer) => void ): void;
+    export function readFile(filename: string, encoding: string, callback: (err: Error, data: string) => void ): void;
     export function readFile(filename: string, callback: (err: Error, data: NodeBuffer) => void ): void;
     export function readFileSync(filename: string): NodeBuffer;
-    export function readFileSync(filename: string, encoding: string): String;
+    export function readFileSync(filename: string, encoding: string): string;
     export function writeFile(filename: string, data: any, encoding?: string, callback?: Function): void;
     export function writeFileSync(filename: string, data: any, encoding?: string): void;
     export function appendFile(filename: string, data: any, encoding?: string, callback?: Function): void;
@@ -922,10 +922,10 @@ declare module "crypto" {
     export interface Credentials { context?: any; }
     export function createCredentials(details: CredentialDetails): Credentials;
     export function createHash(algorithm: string): Hash;
+    export function createHmac(algorithm: string, key: string): Hmac;
     interface Hash {
         update(data: any, input_encoding?: string): void;
-        digest(encoding?: string): void;
-        createHmac(algorithm: string, key: string): Hmac;
+        digest(encoding?: string): string;
     }
     interface Hmac {
         update(data: any): void;