diff --git a/scripts/processDiagnosticMessages.ts b/scripts/processDiagnosticMessages.ts
index 9cfde5b2964..0a81b993616 100644
--- a/scripts/processDiagnosticMessages.ts
+++ b/scripts/processDiagnosticMessages.ts
@@ -55,7 +55,7 @@ function buildInfoFileOutput(messageTable: InputDiagnosticMessageTable, nameMap:
         '// <auto-generated />\r\n' +
         '/// <reference path="types.ts" />\r\n' +
         '/* @internal */\r\n' +
-        'module ts {\r\n' +
+        'namespace ts {\r\n' +
         '    export var Diagnostics = {\r\n';
     var names = Utilities.getObjectKeys(messageTable);
     for (var i = 0; i < names.length; i++) {
diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index d411b840dce..ab391639d0c 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -1,7 +1,7 @@
 /// <reference path="parser.ts"/>
 
 /* @internal */
-module ts {
+namespace ts {
     export let bindTime = 0;
 
     export const enum ModuleInstanceState {
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index c0c11bce5a8..407651c6846 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -1,7 +1,7 @@
 /// <reference path="binder.ts"/>
 
 /* @internal */
-module ts {
+namespace ts {
     let nextSymbolId = 1;
     let nextNodeId = 1;
     let nextMergeId = 1;
diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index a3065bd7a4b..07bccf4a5ef 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -3,7 +3,7 @@
 /// <reference path="core.ts"/>
 /// <reference path="scanner.ts"/>
 
-module ts {
+namespace ts {
     /* @internal */
     export var optionDeclarations: CommandLineOption[] = [
         {
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index dde1e3d6b57..0c0414f3b12 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -1,7 +1,7 @@
 /// <reference path="types.ts"/>
 
 /* @internal */
-module ts {
+namespace ts {
     // Ternary values are defined such that
     // x & y is False if either x or y is False.
     // x & y is Maybe if either x or y is Maybe, but neither x or y is False.
diff --git a/src/compiler/declarationEmitter.ts b/src/compiler/declarationEmitter.ts
index 5c705f18190..a2edc632de3 100644
--- a/src/compiler/declarationEmitter.ts
+++ b/src/compiler/declarationEmitter.ts
@@ -1,7 +1,7 @@
 /// <reference path="checker.ts"/>
 
 /* @internal */
-module ts {
+namespace ts {
     interface ModuleElementDeclarationEmitInfo {
         node: Node;
         outputPos: number;
diff --git a/src/compiler/diagnosticInformationMap.generated.ts b/src/compiler/diagnosticInformationMap.generated.ts
index 9f6190ead11..43330935f4f 100644
--- a/src/compiler/diagnosticInformationMap.generated.ts
+++ b/src/compiler/diagnosticInformationMap.generated.ts
@@ -1,7 +1,7 @@
 // <auto-generated />
 /// <reference path="types.ts" />
 /* @internal */
-module ts {
+namespace ts {
     export var Diagnostics = {
         Unterminated_string_literal: { code: 1002, category: DiagnosticCategory.Error, key: "Unterminated string literal." },
         Identifier_expected: { code: 1003, category: DiagnosticCategory.Error, key: "Identifier expected." },
diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index df40d10ddf1..8081668f98c 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2,7 +2,7 @@
 /// <reference path="declarationEmitter.ts"/>
 
 /* @internal */
-module ts {
+namespace ts {
     export function isExternalModuleOrDeclarationFile(sourceFile: SourceFile) {
         return isExternalModule(sourceFile) || isDeclarationFile(sourceFile);
     }
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 627893d59eb..f964febaf5d 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -1,7 +1,7 @@
 /// <reference path="scanner.ts"/>
 /// <reference path="utilities.ts"/>
 
-module ts {
+namespace ts {
     let nodeConstructors = new Array<new () => Node>(SyntaxKind.Count);
     /* @internal */ export let parseTime = 0;
 
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index c09b70a0c6d..aa8a413aaa9 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1,7 +1,7 @@
 /// <reference path="sys.ts" />
 /// <reference path="emitter.ts" />
 
-module ts {
+namespace ts {
     /* @internal */ export let programTime = 0;
     /* @internal */ export let emitTime = 0;
     /* @internal */ export let ioReadTime = 0;
diff --git a/src/compiler/scanner.ts b/src/compiler/scanner.ts
index d7e65dff81c..fd8883045fe 100644
--- a/src/compiler/scanner.ts
+++ b/src/compiler/scanner.ts
@@ -1,7 +1,7 @@
 /// <reference path="core.ts"/>
 /// <reference path="diagnosticInformationMap.generated.ts"/>
 
-module ts {
+namespace ts {
     export interface ErrorCallback {
         (message: DiagnosticMessage, length: number): void;
     }
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 75e8af357bb..a47d6959ba8 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -1,6 +1,6 @@
 /// <reference path="core.ts"/>
 
-module ts {
+namespace ts {
     export interface System {
         args: string[];
         newLine: string;
diff --git a/src/compiler/tsc.ts b/src/compiler/tsc.ts
index 15cc665e351..2903c3a31f4 100644
--- a/src/compiler/tsc.ts
+++ b/src/compiler/tsc.ts
@@ -1,7 +1,7 @@
 /// <reference path="program.ts"/>
 /// <reference path="commandLineParser.ts"/>
 
-module ts {
+namespace ts {
     export interface SourceFile {
         fileWatcher: FileWatcher;
     }
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 70962ea13c8..cf7a6dff2d1 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1,4 +1,4 @@
-module ts {
+namespace ts {
     export interface Map<T> {
         [index: string]: T;
     }
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 6c0943f22fd..1aad9d5b06b 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1,7 +1,7 @@
 /// <reference path="binder.ts" />
 
 /* @internal */
-module ts {
+namespace ts {
     export interface ReferencePathMatchResult {
         fileReference?: FileReference
         diagnosticMessage?: DiagnosticMessage
@@ -2002,7 +2002,7 @@ module ts {
     }
 }
 
-module ts {
+namespace ts {
     export function getDefaultLibFileName(options: CompilerOptions): string {
         return options.target === ScriptTarget.ES6 ? "lib.es6.d.ts" : "lib.d.ts";
     }
diff --git a/src/server/client.ts b/src/server/client.ts
index f1c5e424d47..3546f8339ee 100644
--- a/src/server/client.ts
+++ b/src/server/client.ts
@@ -1,6 +1,6 @@
 /// <reference path="session.ts" />
  
-module ts.server {
+namespace ts.server {
 
     export interface SessionClientHost extends LanguageServiceHost {
         writeMessage(message: string): void;
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index bc9e685825c..9e235e2cc7d 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -4,7 +4,7 @@
 /// <reference path="session.ts" />
 /// <reference path="node.d.ts" />
 
-module ts.server {
+namespace ts.server {
     export interface Logger {
         close(): void;
         isVerbose(): boolean;
diff --git a/src/server/protocol.d.ts b/src/server/protocol.d.ts
index ef9ad7984f6..336bc11c9f3 100644
--- a/src/server/protocol.d.ts
+++ b/src/server/protocol.d.ts
@@ -1,7 +1,7 @@
 /** 
   * Declaration module describing the TypeScript Server protocol 
   */
-declare module ts.server.protocol {
+declare namespace ts.server.protocol {
     /** 
       * A TypeScript Server message 
       */
diff --git a/src/server/server.ts b/src/server/server.ts
index 828deca2b2d..b4b35edd3f3 100644
--- a/src/server/server.ts
+++ b/src/server/server.ts
@@ -1,7 +1,7 @@
 /// <reference path="node.d.ts" />
 /// <reference path="session.ts" />
 
-module ts.server {
+namespace ts.server {
     var nodeproto: typeof NodeJS._debugger = require('_debugger');
     var readline: NodeJS.ReadLine = require('readline');
     var path: NodeJS.Path = require('path');
diff --git a/src/server/session.ts b/src/server/session.ts
index a4cb3e59b4e..f9cfb4f9f7d 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -4,7 +4,7 @@
 /// <reference path="protocol.d.ts" />
 /// <reference path="editorServices.ts" />
 
-module ts.server {
+namespace ts.server {
     var spaceCache:string[] = [];
 
     interface StackTraceError extends Error {
diff --git a/src/services/breakpoints.ts b/src/services/breakpoints.ts
index 41079c08201..4d3d7d331a5 100644
--- a/src/services/breakpoints.ts
+++ b/src/services/breakpoints.ts
@@ -4,7 +4,7 @@
 /// <reference path='services.ts' />
 
 /* @internal */
-module ts.BreakpointResolver {
+namespace ts.BreakpointResolver {
     /**
      * Get the breakpoint span in given sourceFile
      */
diff --git a/src/services/formatting/formatting.ts b/src/services/formatting/formatting.ts
index ef25d23a5c9..011f7d7fa5e 100644
--- a/src/services/formatting/formatting.ts
+++ b/src/services/formatting/formatting.ts
@@ -4,7 +4,7 @@
 ///<reference path='references.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
 
     export interface TextRangeWithKind extends TextRange {
         kind: SyntaxKind;
diff --git a/src/services/formatting/formattingContext.ts b/src/services/formatting/formattingContext.ts
index 84c09b86bb9..c9b9952a49e 100644
--- a/src/services/formatting/formattingContext.ts
+++ b/src/services/formatting/formattingContext.ts
@@ -1,7 +1,7 @@
 /// <reference path="references.ts"/>
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export class FormattingContext {
         public currentTokenSpan: TextRangeWithKind;
         public nextTokenSpan: TextRangeWithKind;
diff --git a/src/services/formatting/formattingRequestKind.ts b/src/services/formatting/formattingRequestKind.ts
index 4bdc83ffd45..d0397e4a8d9 100644
--- a/src/services/formatting/formattingRequestKind.ts
+++ b/src/services/formatting/formattingRequestKind.ts
@@ -1,7 +1,7 @@
 /// <reference path="references.ts"/>
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export const enum FormattingRequestKind {
         FormatDocument,
         FormatSelection,
diff --git a/src/services/formatting/formattingScanner.ts b/src/services/formatting/formattingScanner.ts
index 0d4dd8eacde..7e77878051c 100644
--- a/src/services/formatting/formattingScanner.ts
+++ b/src/services/formatting/formattingScanner.ts
@@ -2,7 +2,7 @@
 /// <reference path="..\..\compiler\scanner.ts"/>
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     let scanner = createScanner(ScriptTarget.Latest, /*skipTrivia*/ false);
 
     export interface FormattingScanner {
diff --git a/src/services/formatting/rule.ts b/src/services/formatting/rule.ts
index f1bb39e69c2..543295f364f 100644
--- a/src/services/formatting/rule.ts
+++ b/src/services/formatting/rule.ts
@@ -1,7 +1,7 @@
 ///<reference path='references.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export class Rule {
         constructor(
             public Descriptor: RuleDescriptor,
diff --git a/src/services/formatting/ruleAction.ts b/src/services/formatting/ruleAction.ts
index e5734b1a03c..13e9043e1c6 100644
--- a/src/services/formatting/ruleAction.ts
+++ b/src/services/formatting/ruleAction.ts
@@ -1,7 +1,7 @@
 ///<reference path='references.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export const enum RuleAction {
         Ignore      = 0x00000001,
         Space       = 0x00000002,
diff --git a/src/services/formatting/ruleDescriptor.ts b/src/services/formatting/ruleDescriptor.ts
index f3492715f3a..96506adc3dc 100644
--- a/src/services/formatting/ruleDescriptor.ts
+++ b/src/services/formatting/ruleDescriptor.ts
@@ -1,7 +1,7 @@
 ///<reference path='references.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export class RuleDescriptor {
         constructor(public LeftTokenRange: Shared.TokenRange, public RightTokenRange: Shared.TokenRange) {
         }
diff --git a/src/services/formatting/ruleFlag.ts b/src/services/formatting/ruleFlag.ts
index 4e6e002c184..7619f232ad4 100644
--- a/src/services/formatting/ruleFlag.ts
+++ b/src/services/formatting/ruleFlag.ts
@@ -2,7 +2,7 @@
 
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export const enum RuleFlags {
         None,
         CanDeleteNewLines
diff --git a/src/services/formatting/ruleOperation.ts b/src/services/formatting/ruleOperation.ts
index 1cca437e491..e897513bd27 100644
--- a/src/services/formatting/ruleOperation.ts
+++ b/src/services/formatting/ruleOperation.ts
@@ -1,7 +1,7 @@
 ///<reference path='references.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export class RuleOperation {
         public Context: RuleOperationContext;
         public Action: RuleAction;
diff --git a/src/services/formatting/ruleOperationContext.ts b/src/services/formatting/ruleOperationContext.ts
index 69ed3453a75..515250d7264 100644
--- a/src/services/formatting/ruleOperationContext.ts
+++ b/src/services/formatting/ruleOperationContext.ts
@@ -1,7 +1,7 @@
 ///<reference path='references.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
 
     export class RuleOperationContext {
         private customContextChecks: { (context: FormattingContext): boolean; }[];
diff --git a/src/services/formatting/rules.ts b/src/services/formatting/rules.ts
index 3352253a86c..c10e3ee69ea 100644
--- a/src/services/formatting/rules.ts
+++ b/src/services/formatting/rules.ts
@@ -1,7 +1,7 @@
 ///<reference path='references.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export class Rules {
         public getRuleName(rule: Rule) {
             let o: ts.Map<any> = <any>this;
diff --git a/src/services/formatting/rulesMap.ts b/src/services/formatting/rulesMap.ts
index 5aae6f40fcd..4f231bd842e 100644
--- a/src/services/formatting/rulesMap.ts
+++ b/src/services/formatting/rulesMap.ts
@@ -1,7 +1,7 @@
 ///<reference path='references.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export class RulesMap {
         public map: RulesBucket[];
         public mapRowLength: number;
diff --git a/src/services/formatting/rulesProvider.ts b/src/services/formatting/rulesProvider.ts
index 0867bcf31c0..bd8f4fc3a5e 100644
--- a/src/services/formatting/rulesProvider.ts
+++ b/src/services/formatting/rulesProvider.ts
@@ -1,7 +1,7 @@
 /// <reference path="references.ts"/>
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export class RulesProvider {
         private globalRules: Rules;
         private options: ts.FormatCodeOptions;
diff --git a/src/services/formatting/smartIndenter.ts b/src/services/formatting/smartIndenter.ts
index 9cd28a40a54..a82e57f050f 100644
--- a/src/services/formatting/smartIndenter.ts
+++ b/src/services/formatting/smartIndenter.ts
@@ -1,7 +1,7 @@
 ///<reference path='..\services.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export module SmartIndenter {
 
         const enum Value {
diff --git a/src/services/formatting/tokenRange.ts b/src/services/formatting/tokenRange.ts
index 59a376f15f9..27a43280f2c 100644
--- a/src/services/formatting/tokenRange.ts
+++ b/src/services/formatting/tokenRange.ts
@@ -1,7 +1,7 @@
 ///<reference path='references.ts' />
 
 /* @internal */
-module ts.formatting {
+namespace ts.formatting {
     export module Shared {
         export interface ITokenAccess {
             GetTokens(): SyntaxKind[];
diff --git a/src/services/navigateTo.ts b/src/services/navigateTo.ts
index aec3bdf765f..a4cc7ec2ad5 100644
--- a/src/services/navigateTo.ts
+++ b/src/services/navigateTo.ts
@@ -1,5 +1,5 @@
 /* @internal */
-module ts.NavigateTo {
+namespace ts.NavigateTo {
     type RawNavigateToItem = { name: string; fileName: string; matchKind: PatternMatchKind; isCaseSensitive: boolean; declaration: Declaration };
 
     export function getNavigateToItems(program: Program, cancellationToken: CancellationTokenObject, searchValue: string, maxResultCount: number): NavigateToItem[] {
diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index 8acdbac20c5..ead9bc519ce 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -1,7 +1,7 @@
 /// <reference path='services.ts' />
 
 /* @internal */
-module ts.NavigationBar {
+namespace ts.NavigationBar {
     export function getNavigationBarItems(sourceFile: SourceFile): ts.NavigationBarItem[]  {
         // If the source file has any child items, then it included in the tree
         // and takes lexical ownership of all other top-level items.
diff --git a/src/services/outliningElementsCollector.ts b/src/services/outliningElementsCollector.ts
index d413f611209..08b089cd75e 100644
--- a/src/services/outliningElementsCollector.ts
+++ b/src/services/outliningElementsCollector.ts
@@ -1,5 +1,5 @@
 /* @internal */
-module ts {
+namespace ts {
     export module OutliningElementsCollector {
         export function collectElements(sourceFile: SourceFile): OutliningSpan[] {
             let elements: OutliningSpan[] = [];
diff --git a/src/services/patternMatcher.ts b/src/services/patternMatcher.ts
index 88cd9fdbb0f..d56c7fac975 100644
--- a/src/services/patternMatcher.ts
+++ b/src/services/patternMatcher.ts
@@ -1,5 +1,5 @@
 /* @internal */
-module ts {
+namespace ts {
     // Note(cyrusn): this enum is ordered from strongest match type to weakest match type.
     export enum PatternMatchKind {
         exact,
diff --git a/src/services/services.ts b/src/services/services.ts
index 5e8392fa9de..105859f7ccf 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -10,7 +10,7 @@
 /// <reference path='formatting\formatting.ts' />
 /// <reference path='formatting\smartIndenter.ts' />
 
-module ts {
+namespace ts {
     /** The version of the language service API */
     export let servicesVersion = "0.4"
 
diff --git a/src/services/shims.ts b/src/services/shims.ts
index 004393fb3b5..c158b041e97 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -19,7 +19,7 @@
 var debugObjectHost = (<any>this);
 
 /* @internal */
-module ts {
+namespace ts {
     export interface ScriptSnapshotShim {
         /** Gets a portion of the script snapshot specified by [start, end). */
         getText(start: number, end: number): string;
diff --git a/src/services/signatureHelp.ts b/src/services/signatureHelp.ts
index 77aba4c85c1..fce4e2c3025 100644
--- a/src/services/signatureHelp.ts
+++ b/src/services/signatureHelp.ts
@@ -1,6 +1,6 @@
 ///<reference path='services.ts' />
 /* @internal */
-module ts.SignatureHelp {
+namespace ts.SignatureHelp {
 
     // A partially written generic type expression is not guaranteed to have the correct syntax tree. the expression could be parsed as less than/greater than expression or a comma expression
     // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference. 
diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index da0a0aa96c1..73b88a3df26 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -1,6 +1,6 @@
 // These utilities are common to multiple language service features.
 /* @internal */
-module ts {
+namespace ts {
     export interface ListItemInfo {
         listItemIndex: number;
         list: Node;
@@ -502,7 +502,7 @@ module ts {
 
 // Display-part writer helpers
 /* @internal */
-module ts {
+namespace ts {
     export function isFirstDeclarationOfSymbolParameter(symbol: Symbol) {
         return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === SyntaxKind.Parameter;
     }