diff --git a/README.md b/README.md
index 93e7f262..b9b4c177 100644
--- a/README.md
+++ b/README.md
@@ -122,6 +122,7 @@ computational environment for Jupyter, supporting interactive data science and s
 - [**Kubebox**](https://github.com/astefanutti/kubebox): Terminal console for Kubernetes clusters.
 - [**Azure Cloud Shell**](https://shell.azure.com): Azure Cloud Shell is a Microsoft-managed admin machine built on Azure, for Azure.
 - [**atom-xterm**](https://atom.io/packages/atom-xterm): Atom plugin for providing terminals inside your Atom workspace.
+- [**rtty**](https://github.com/zhaojh329/rtty): A reverse proxy WebTTY. It is composed of the client and the server.
 
 Do you use xterm.js in your application as well? Please [open a Pull Request](https://github.com/sourcelair/xterm.js/pulls) to include it here. We would love to have it in our list.
 
diff --git a/src/addons/attach/Intefaces.ts b/src/addons/attach/Intefaces.ts
new file mode 100644
index 00000000..ab809af9
--- /dev/null
+++ b/src/addons/attach/Intefaces.ts
@@ -0,0 +1,18 @@
+/**
+ * Copyright (c) 2018 The xterm.js authors. All rights reserved.
+ * @license MIT
+ *
+ * Implements the attach method, that attaches the terminal to a WebSocket stream.
+ */
+
+import { Terminal } from 'xterm';
+
+export interface IAttachAddonTerminal extends Terminal {
+  __socket?: WebSocket;
+  __attachSocketBuffer?: string;
+
+  __getMessage?(ev: MessageEvent): void;
+  __flushBuffer?(): void;
+  __pushToBuffer?(data: string): void;
+  __sendData?(data: string): void;
+}
diff --git a/src/addons/attach/attach.test.ts b/src/addons/attach/attach.test.ts
index a13885bb..018cfb31 100644
--- a/src/addons/attach/attach.test.ts
+++ b/src/addons/attach/attach.test.ts
@@ -12,7 +12,7 @@ class MockTerminal {}
 describe('attach addon', () => {
   describe('apply', () => {
     it('should do register the `attach` and `detach` methods', () => {
-      attach.apply(MockTerminal);
+      attach.apply(<any>MockTerminal);
       assert.equal(typeof (<any>MockTerminal).prototype.attach, 'function');
       assert.equal(typeof (<any>MockTerminal).prototype.detach, 'function');
     });
diff --git a/src/addons/attach/attach.ts b/src/addons/attach/attach.ts
index ba938695..d963a658 100644
--- a/src/addons/attach/attach.ts
+++ b/src/addons/attach/attach.ts
@@ -5,38 +5,42 @@
  * Implements the attach method, that attaches the terminal to a WebSocket stream.
  */
 
+/// <reference path="../../../typings/xterm.d.ts"/>
+
+import { Terminal } from 'xterm';
+import { IAttachAddonTerminal } from './Intefaces';
+
 /**
  * Attaches the given terminal to the given socket.
  *
- * @param {Terminal} term - The terminal to be attached to the given socket.
- * @param {WebSocket} socket - The socket to attach the current terminal.
- * @param {boolean} bidirectional - Whether the terminal should send data
- *                                  to the socket as well.
- * @param {boolean} buffered - Whether the rendering of incoming data
- *                             should happen instantly or at a maximum
- *                             frequency of 1 rendering per 10ms.
+ * @param term The terminal to be attached to the given socket.
+ * @param socket The socket to attach the current terminal.
+ * @param bidirectional Whether the terminal should send data to the socket as well.
+ * @param buffered Whether the rendering of incoming data should happen instantly or at a maximum
+ * frequency of 1 rendering per 10ms.
  */
-export function attach(term: any, socket: WebSocket, bidirectional: boolean, buffered: boolean): void {
+export function attach(term: Terminal, socket: WebSocket, bidirectional: boolean, buffered: boolean): void {
+  const addonTerminal = <IAttachAddonTerminal>term;
   bidirectional = (typeof bidirectional === 'undefined') ? true : bidirectional;
-  term.socket = socket;
+  addonTerminal.__socket = socket;
 
-  term._flushBuffer = () => {
-    term.write(term._attachSocketBuffer);
-    term._attachSocketBuffer = null;
+  addonTerminal.__flushBuffer = () => {
+    addonTerminal.write(addonTerminal.__attachSocketBuffer);
+    addonTerminal.__attachSocketBuffer = null;
   };
 
-  term._pushToBuffer = (data: string) => {
-    if (term._attachSocketBuffer) {
-      term._attachSocketBuffer += data;
+  addonTerminal.__pushToBuffer = (data: string) => {
+    if (addonTerminal.__attachSocketBuffer) {
+      addonTerminal.__attachSocketBuffer += data;
     } else {
-      term._attachSocketBuffer = data;
-      setTimeout(term._flushBuffer, 10);
+      addonTerminal.__attachSocketBuffer = data;
+      setTimeout(addonTerminal.__flushBuffer, 10);
     }
   };
 
   let myTextDecoder;
 
-  term._getMessage = function(ev: MessageEvent): void {
+  addonTerminal.__getMessage = function(ev: MessageEvent): void {
     let str;
     if (typeof ev.data === 'object') {
       if (ev.data instanceof ArrayBuffer) {
@@ -51,71 +55,68 @@ export function attach(term: any, socket: WebSocket, bidirectional: boolean, buf
     }
 
     if (buffered) {
-      term._pushToBuffer(str || ev.data);
+      addonTerminal.__pushToBuffer(str || ev.data);
     } else {
-      term.write(str || ev.data);
+      addonTerminal.write(str || ev.data);
     }
   };
 
-  term._sendData = (data: string) => {
+  addonTerminal.__sendData = (data: string) => {
     if (socket.readyState !== 1) {
       return;
     }
     socket.send(data);
   };
 
-  socket.addEventListener('message', term._getMessage);
+  socket.addEventListener('message', addonTerminal.__getMessage);
 
   if (bidirectional) {
-    term.on('data', term._sendData);
+    addonTerminal.on('data', addonTerminal.__sendData);
   }
 
-  socket.addEventListener('close', term.detach.bind(term, socket));
-  socket.addEventListener('error', term.detach.bind(term, socket));
+  socket.addEventListener('close', () => detach(addonTerminal, socket));
+  socket.addEventListener('error', () => detach(addonTerminal, socket));
 }
 
 /**
  * Detaches the given terminal from the given socket
  *
- * @param {Terminal} term - The terminal to be detached from the given socket.
- * @param {WebSocket} socket - The socket from which to detach the current
- *                             terminal.
+ * @param term The terminal to be detached from the given socket.
+ * @param socket The socket from which to detach the current terminal.
  */
-export function detach(term: any, socket: WebSocket): void {
-  term.off('data', term._sendData);
+export function detach(term: Terminal, socket: WebSocket): void {
+  const addonTerminal = <IAttachAddonTerminal>term;
+  addonTerminal.off('data', addonTerminal.__sendData);
 
-  socket = (typeof socket === 'undefined') ? term.socket : socket;
+  socket = (typeof socket === 'undefined') ? addonTerminal.__socket : socket;
 
   if (socket) {
-    socket.removeEventListener('message', term._getMessage);
+    socket.removeEventListener('message', addonTerminal.__getMessage);
   }
 
-  delete term.socket;
+  delete addonTerminal.__socket;
 }
 
 
-export function apply(terminalConstructor: any): void {
+export function apply(terminalConstructor: typeof Terminal): void {
   /**
    * Attaches the current terminal to the given socket
    *
-   * @param {WebSocket} socket - The socket to attach the current terminal.
-   * @param {boolean} bidirectional - Whether the terminal should send data
-   *                                  to the socket as well.
-   * @param {boolean} buffered - Whether the rendering of incoming data
-   *                             should happen instantly or at a maximum
-   *                             frequency of 1 rendering per 10ms.
+   * @param socket The socket to attach the current terminal.
+   * @param bidirectional Whether the terminal should send data to the socket as well.
+   * @param buffered Whether the rendering of incoming data should happen instantly or at a maximum
+   * frequency of 1 rendering per 10ms.
    */
-  terminalConstructor.prototype.attach = function (socket: WebSocket, bidirectional: boolean, buffered: boolean): void {
+  (<any>terminalConstructor.prototype).attach = function (socket: WebSocket, bidirectional: boolean, buffered: boolean): void {
     attach(this, socket, bidirectional, buffered);
   };
 
   /**
    * Detaches the current terminal from the given socket.
    *
-   * @param {WebSocket} socket - The socket from which to detach the current
-   *                             terminal.
+   * @param socket The socket from which to detach the current terminal.
    */
-  terminalConstructor.prototype.detach = function (socket: WebSocket): void {
+  (<any>terminalConstructor.prototype).detach = function (socket: WebSocket): void {
     detach(this, socket);
   };
 }
diff --git a/src/addons/fit/fit.test.ts b/src/addons/fit/fit.test.ts
index 0dc17963..9a6d89fd 100644
--- a/src/addons/fit/fit.test.ts
+++ b/src/addons/fit/fit.test.ts
@@ -12,7 +12,7 @@ class MockTerminal {}
 describe('fit addon', () => {
   describe('apply', () => {
     it('should do register the `proposeGeometry` and `fit` methods', () => {
-      fit.apply(MockTerminal);
+      fit.apply(<any>MockTerminal);
       assert.equal(typeof (<any>MockTerminal).prototype.proposeGeometry, 'function');
       assert.equal(typeof (<any>MockTerminal).prototype.fit, 'function');
     });
diff --git a/src/addons/fit/fit.ts b/src/addons/fit/fit.ts
index 63111094..75e854d9 100644
--- a/src/addons/fit/fit.ts
+++ b/src/addons/fit/fit.ts
@@ -13,12 +13,16 @@
  *          row and truncate its width with the current number of columns).
  */
 
+/// <reference path="../../../typings/xterm.d.ts"/>
+
+import { Terminal } from 'xterm';
+
 export interface IGeometry {
   rows: number;
   cols: number;
 }
 
-export function proposeGeometry(term: any): IGeometry {
+export function proposeGeometry(term: Terminal): IGeometry {
   if (!term.element.parentElement) {
     return null;
   }
@@ -31,30 +35,30 @@ export function proposeGeometry(term: any): IGeometry {
   const availableHeight = parentElementHeight - elementPaddingVer;
   const availableWidth = parentElementWidth - elementPaddingHor;
   const geometry = {
-    cols: Math.floor(availableWidth / term.renderer.dimensions.actualCellWidth),
-    rows: Math.floor(availableHeight / term.renderer.dimensions.actualCellHeight)
+    cols: Math.floor(availableWidth / (<any>term).renderer.dimensions.actualCellWidth),
+    rows: Math.floor(availableHeight / (<any>term).renderer.dimensions.actualCellHeight)
   };
 
   return geometry;
 }
 
-export function fit(term: any): void {
+export function fit(term: Terminal): void {
   const geometry = proposeGeometry(term);
   if (geometry) {
     // Force a full render
     if (term.rows !== geometry.rows || term.cols !== geometry.cols) {
-      term.renderer.clear();
+      (<any>term).renderer.clear();
       term.resize(geometry.cols, geometry.rows);
     }
   }
 }
 
-export function apply(terminalConstructor: any): void {
-  terminalConstructor.prototype.proposeGeometry = function (): IGeometry {
+export function apply(terminalConstructor: typeof Terminal): void {
+  (<any>terminalConstructor.prototype).proposeGeometry = function (): IGeometry {
     return proposeGeometry(this);
   };
 
-  terminalConstructor.prototype.fit = function (): void {
+  (<any>terminalConstructor.prototype).fit = function (): void {
     fit(this);
   };
 }
diff --git a/src/addons/fullscreen/fullscreen.test.ts b/src/addons/fullscreen/fullscreen.test.ts
index 9326ac4e..bb98bd30 100644
--- a/src/addons/fullscreen/fullscreen.test.ts
+++ b/src/addons/fullscreen/fullscreen.test.ts
@@ -12,7 +12,7 @@ class MockTerminal {}
 describe('fullscreen addon', () => {
   describe('apply', () => {
     it('should do register the `toggleFullscreen` method', () => {
-      fullscreen.apply(MockTerminal);
+      fullscreen.apply(<any>MockTerminal);
       assert.equal(typeof (<any>MockTerminal).prototype.toggleFullScreen, 'function');
     });
   });
diff --git a/src/addons/fullscreen/fullscreen.ts b/src/addons/fullscreen/fullscreen.ts
index 2e5b72e1..47440667 100644
--- a/src/addons/fullscreen/fullscreen.ts
+++ b/src/addons/fullscreen/fullscreen.ts
@@ -3,13 +3,17 @@
  * @license MIT
  */
 
+/// <reference path="../../../typings/xterm.d.ts"/>
+
+import { Terminal } from 'xterm';
+
 /**
  * Toggle the given terminal's fullscreen mode.
- * @param {Terminal} term - The terminal to toggle full screen mode
- * @param {boolean} fullscreen - Toggle fullscreen on (true) or off (false)
+ * @param term The terminal to toggle full screen mode
+ * @param fullscreen Toggle fullscreen on (true) or off (false)
  */
-export function toggleFullScreen(term: any, fullscreen: boolean): void {
-  let fn;
+export function toggleFullScreen(term: Terminal, fullscreen: boolean): void {
+  let fn: string;
 
   if (typeof fullscreen === 'undefined') {
     fn = (term.element.classList.contains('fullscreen')) ? 'remove' : 'add';
@@ -22,8 +26,8 @@ export function toggleFullScreen(term: any, fullscreen: boolean): void {
   term.element.classList[fn]('fullscreen');
 }
 
-export function apply(terminalConstructor: any): void {
-  terminalConstructor.prototype.toggleFullScreen = function (fullscreen: boolean): void {
+export function apply(terminalConstructor: typeof Terminal): void {
+  (<any>terminalConstructor.prototype).toggleFullScreen = function (fullscreen: boolean): void {
     toggleFullScreen(this, fullscreen);
   };
 }
diff --git a/src/addons/search/Interfaces.ts b/src/addons/search/Interfaces.ts
new file mode 100644
index 00000000..6faa03e2
--- /dev/null
+++ b/src/addons/search/Interfaces.ts
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2018 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { Terminal } from 'xterm';
+
+export interface ISearchAddonTerminal extends Terminal {
+  __searchHelper?: ISearchHelper;
+
+  // TODO: Reuse ITerminal from core
+  buffer: any;
+  selectionManager: any;
+}
+
+export interface ISearchHelper {
+  findNext(term: string): boolean;
+  findPrevious(term: string): boolean;
+}
diff --git a/src/addons/search/SearchHelper.ts b/src/addons/search/SearchHelper.ts
index 5735dd48..dd941682 100644
--- a/src/addons/search/SearchHelper.ts
+++ b/src/addons/search/SearchHelper.ts
@@ -3,8 +3,7 @@
  * @license MIT
  */
 
-// import { ITerminal } from '../../Interfaces';
-// import { translateBufferLineToString } from '../../utils/BufferLine';
+import { ISearchHelper, ISearchAddonTerminal } from './Interfaces';
 
 interface ISearchResult {
   term: string;
@@ -15,8 +14,8 @@ interface ISearchResult {
 /**
  * A class that knows how to search the terminal and how to display the results.
  */
-export class SearchHelper {
-  constructor(private _terminal: any) {
+export class SearchHelper implements ISearchHelper {
+  constructor(private _terminal: ISearchAddonTerminal) {
     // TODO: Search for multiple instances on 1 line
     // TODO: Don't use the actual selection, instead use a "find selection" so multiple instances can be highlighted
     // TODO: Highlight other instances in the viewport
@@ -134,7 +133,7 @@ export class SearchHelper {
       return false;
     }
     this._terminal.selectionManager.setSelection(result.col, result.row, result.term.length);
-    this._terminal.scrollLines(result.row - this._terminal.buffer.ydisp, false);
+    this._terminal.scrollLines(result.row - this._terminal.buffer.ydisp);
     return true;
   }
 }
diff --git a/src/addons/search/search.ts b/src/addons/search/search.ts
index 473c78fc..5c0b2b96 100644
--- a/src/addons/search/search.ts
+++ b/src/addons/search/search.ts
@@ -3,8 +3,11 @@
  * @license MIT
  */
 
-import { SearchHelper } from './SearchHelper';
+/// <reference path="../../../typings/xterm.d.ts"/>
 
+import { SearchHelper } from './SearchHelper';
+import { Terminal } from 'xterm';
+import { ISearchAddonTerminal } from './Interfaces';
 
 /**
  * Find the next instance of the term, then scroll to and select it. If it
@@ -12,11 +15,12 @@ import { SearchHelper } from './SearchHelper';
  * @param term Tne search term.
  * @return Whether a result was found.
  */
-export function findNext(terminal: any, term: string): boolean {
-  if (!terminal._searchHelper) {
-    terminal.searchHelper = new SearchHelper(terminal);
+export function findNext(terminal: Terminal, term: string): boolean {
+  const addonTerminal = <ISearchAddonTerminal>terminal;
+  if (!addonTerminal.__searchHelper) {
+    addonTerminal.__searchHelper = new SearchHelper(addonTerminal);
   }
-  return (<SearchHelper>terminal.searchHelper).findNext(term);
+  return addonTerminal.__searchHelper.findNext(term);
 }
 
 /**
@@ -25,19 +29,20 @@ export function findNext(terminal: any, term: string): boolean {
  * @param term Tne search term.
  * @return Whether a result was found.
  */
-export function findPrevious(terminal: any, term: string): boolean {
-  if (!terminal._searchHelper) {
-    terminal.searchHelper = new SearchHelper(terminal);
+export function findPrevious(terminal: Terminal, term: string): boolean {
+  const addonTerminal = <ISearchAddonTerminal>terminal;
+  if (!addonTerminal.__searchHelper) {
+    addonTerminal.__searchHelper = new SearchHelper(addonTerminal);
   }
-  return (<SearchHelper>terminal.searchHelper).findPrevious(term);
+  return addonTerminal.__searchHelper.findPrevious(term);
 }
 
-export function apply(terminalConstructor: any): void {
-  terminalConstructor.prototype.findNext = function(term: any): boolean {
+export function apply(terminalConstructor: typeof Terminal): void {
+  (<any>terminalConstructor.prototype).findNext = function(term: string): boolean {
     return findNext(this, term);
   };
 
-  terminalConstructor.prototype.findPrevious = function(term: any): boolean {
+  (<any>terminalConstructor.prototype).findPrevious = function(term: string): boolean {
     return findPrevious(this, term);
   };
 }
diff --git a/src/addons/terminado/Intefaces.ts b/src/addons/terminado/Intefaces.ts
new file mode 100644
index 00000000..8f17b0cc
--- /dev/null
+++ b/src/addons/terminado/Intefaces.ts
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2018 The xterm.js authors. All rights reserved.
+ * @license MIT
+ *
+ * Implements the attach method, that attaches the terminal to a WebSocket stream.
+ */
+
+import { Terminal } from 'xterm';
+
+export interface ITerminadoAddonTerminal extends Terminal {
+  __socket?: WebSocket;
+  __attachSocketBuffer?: string;
+
+  __getMessage?(ev: MessageEvent): void;
+  __flushBuffer?(): void;
+  __pushToBuffer?(data: string): void;
+  __sendData?(data: string): void;
+  __setSize?(size: {rows: number, cols: number}): void;
+}
diff --git a/src/addons/terminado/terminado.test.ts b/src/addons/terminado/terminado.test.ts
index e258bd7c..2e4a53c5 100644
--- a/src/addons/terminado/terminado.test.ts
+++ b/src/addons/terminado/terminado.test.ts
@@ -12,7 +12,7 @@ class MockTerminal {}
 describe('terminado addon', () => {
   describe('apply', () => {
     it('should do register the `terminadoAttach` and `terminadoDetach` methods', () => {
-      terminado.apply(MockTerminal);
+      terminado.apply(<any>MockTerminal);
       assert.equal(typeof (<any>MockTerminal).prototype.terminadoAttach, 'function');
       assert.equal(typeof (<any>MockTerminal).prototype.terminadoDetach, 'function');
     });
diff --git a/src/addons/terminado/terminado.ts b/src/addons/terminado/terminado.ts
index e703198f..d5cf72d1 100644
--- a/src/addons/terminado/terminado.ts
+++ b/src/addons/terminado/terminado.ts
@@ -6,106 +6,107 @@
  * WebSocket stream.
  */
 
+/// <reference path="../../../typings/xterm.d.ts"/>
+
+import { Terminal } from 'xterm';
+import { ITerminadoAddonTerminal } from './Intefaces';
+
 /**
  * Attaches the given terminal to the given socket.
  *
- * @param {Terminal} term - The terminal to be attached to the given socket.
- * @param {WebSocket} socket - The socket to attach the current terminal.
- * @param {boolean} bidirectional - Whether the terminal should send data
- *                                  to the socket as well.
- * @param {boolean} buffered - Whether the rendering of incoming data
- *                             should happen instantly or at a maximum
- *                             frequency of 1 rendering per 10ms.
+ * @param term The terminal to be attached to the given socket.
+ * @param socket The socket to attach the current terminal.
+ * @param bidirectional Whether the terminal should send data to the socket as well.
+ * @param buffered Whether the rendering of incoming data should happen instantly or at a maximum
+ * frequency of 1 rendering per 10ms.
  */
-export function terminadoAttach(term: any, socket: WebSocket, bidirectional: boolean, buffered: boolean): void {
+export function terminadoAttach(term: Terminal, socket: WebSocket, bidirectional: boolean, buffered: boolean): void {
+  const addonTerminal = <ITerminadoAddonTerminal>term;
   bidirectional = (typeof bidirectional === 'undefined') ? true : bidirectional;
-  term.socket = socket;
+  addonTerminal.__socket = socket;
 
-  term._flushBuffer = () => {
-    term.write(term._attachSocketBuffer);
-    term._attachSocketBuffer = null;
+  addonTerminal.__flushBuffer = () => {
+    addonTerminal.write(addonTerminal.__attachSocketBuffer);
+    addonTerminal.__attachSocketBuffer = null;
   };
 
-  term._pushToBuffer = (data) => {
-    if (term._attachSocketBuffer) {
-      term._attachSocketBuffer += data;
+  addonTerminal.__pushToBuffer = (data: string) => {
+    if (addonTerminal.__attachSocketBuffer) {
+      addonTerminal.__attachSocketBuffer += data;
     } else {
-      term._attachSocketBuffer = data;
-      setTimeout(term._flushBuffer, 10);
+      addonTerminal.__attachSocketBuffer = data;
+      setTimeout(addonTerminal.__flushBuffer, 10);
     }
   };
 
-  term._getMessage = (ev: MessageEvent) => {
+  addonTerminal.__getMessage = (ev: MessageEvent) => {
     const data = JSON.parse(ev.data);
     if (data[0] === 'stdout') {
       if (buffered) {
-        term._pushToBuffer(data[1]);
+        addonTerminal.__pushToBuffer(data[1]);
       } else {
-        term.write(data[1]);
+        addonTerminal.write(data[1]);
       }
     }
   };
 
-  term._sendData = (data: string) => {
+  addonTerminal.__sendData = (data: string) => {
     socket.send(JSON.stringify(['stdin', data]));
   };
 
-  term._setSize = (size: {rows: number, cols: number}) => {
+  addonTerminal.__setSize = (size: {rows: number, cols: number}) => {
     socket.send(JSON.stringify(['set_size', size.rows, size.cols]));
   };
 
-  socket.addEventListener('message', term._getMessage);
+  socket.addEventListener('message', addonTerminal.__getMessage);
 
   if (bidirectional) {
-    term.on('data', term._sendData);
+    addonTerminal.on('data', addonTerminal.__sendData);
   }
-  term.on('resize', term._setSize);
+  addonTerminal.on('resize', addonTerminal.__setSize);
 
-  socket.addEventListener('close', term.terminadoDetach.bind(term, socket));
-  socket.addEventListener('error', term.terminadoDetach.bind(term, socket));
+  socket.addEventListener('close', () => terminadoDetach(addonTerminal, socket));
+  socket.addEventListener('error', () => terminadoDetach(addonTerminal, socket));
 }
 
 /**
  * Detaches the given terminal from the given socket
  *
- * @param {Xterm} term - The terminal to be detached from the given socket.
- * @param {WebSocket} socket - The socket from which to detach the current
- *                             terminal.
+ * @param term The terminal to be detached from the given socket.
+ * @param socket The socket from which to detach the current terminal.
  */
-export function terminadoDetach(term: any, socket: WebSocket): void {
-  term.off('data', term._sendData);
+export function terminadoDetach(term: Terminal, socket: WebSocket): void {
+  const addonTerminal = <ITerminadoAddonTerminal>term;
+  addonTerminal.off('data', addonTerminal.__sendData);
 
-  socket = (typeof socket === 'undefined') ? term.socket : socket;
+  socket = (typeof socket === 'undefined') ? addonTerminal.__socket : socket;
 
   if (socket) {
-    socket.removeEventListener('message', term._getMessage);
+    socket.removeEventListener('message', addonTerminal.__getMessage);
   }
 
-  delete term.socket;
+  delete addonTerminal.__socket;
 }
 
-export function apply(terminalConstructor: any): void {
+export function apply(terminalConstructor: typeof Terminal): void {
   /**
    * Attaches the current terminal to the given socket
    *
-   * @param {WebSocket} socket - The socket to attach the current terminal.
-   * @param {boolean} bidirectional - Whether the terminal should send data
-   *                                  to the socket as well.
-   * @param {boolean} buffered - Whether the rendering of incoming data
-   *                             should happen instantly or at a maximum
-   *                             frequency of 1 rendering per 10ms.
+   * @param socket - The socket to attach the current terminal.
+   * @param bidirectional - Whether the terminal should send data to the socket as well.
+   * @param buffered - Whether the rendering of incoming data should happen instantly or at a
+   * maximum frequency of 1 rendering per 10ms.
    */
-  terminalConstructor.prototype.terminadoAttach = function(socket: WebSocket, bidirectional: boolean, buffered: boolean): void {
+  (<any>terminalConstructor.prototype).terminadoAttach = function (socket: WebSocket, bidirectional: boolean, buffered: boolean): void {
     return terminadoAttach(this, socket, bidirectional, buffered);
   };
 
   /**
    * Detaches the current terminal from the given socket.
    *
-   * @param {WebSocket} socket - The socket from which to detach the current
-   *                             terminal.
+   * @param socket The socket from which to detach the current terminal.
    */
-  terminalConstructor.prototype.terminadoDetach = function(socket: WebSocket): void {
+  (<any>terminalConstructor.prototype).terminadoDetach = function (socket: WebSocket): void {
     return terminadoDetach(this, socket);
   };
 }
diff --git a/src/addons/winptyCompat/Interfaces.ts b/src/addons/winptyCompat/Interfaces.ts
new file mode 100644
index 00000000..8e02c64b
--- /dev/null
+++ b/src/addons/winptyCompat/Interfaces.ts
@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) 2018 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { Terminal } from 'xterm';
+
+export interface IWinptyCompatAddonTerminal extends Terminal {
+  buffer: any;
+}
diff --git a/src/addons/winptyCompat/winptyCompat.test.ts b/src/addons/winptyCompat/winptyCompat.test.ts
index 73761fc9..0c9269ed 100644
--- a/src/addons/winptyCompat/winptyCompat.test.ts
+++ b/src/addons/winptyCompat/winptyCompat.test.ts
@@ -12,7 +12,7 @@ class MockTerminal {}
 describe('winptyCompat addon', () => {
   describe('apply', () => {
     it('should do register the `winptyCompatInit` method', () => {
-      winptyCompat.apply(MockTerminal);
+      winptyCompat.apply(<any>MockTerminal);
       assert.equal(typeof (<any>MockTerminal).prototype.winptyCompatInit, 'function');
     });
   });
diff --git a/src/addons/winptyCompat/winptyCompat.ts b/src/addons/winptyCompat/winptyCompat.ts
index b594355b..61524e12 100644
--- a/src/addons/winptyCompat/winptyCompat.ts
+++ b/src/addons/winptyCompat/winptyCompat.ts
@@ -3,36 +3,43 @@
  * @license MIT
  */
 
-export function winptyCompatInit(terminal: any): void {
-    // Don't do anything when the platform is not Windows
-    const isWindows = ['Windows', 'Win16', 'Win32', 'WinCE'].indexOf(navigator.platform) >= 0;
-    if (!isWindows) {
-      return;
+/// <reference path="../../../typings/xterm.d.ts"/>
+
+import { Terminal } from 'xterm';
+import { IWinptyCompatAddonTerminal } from './Interfaces';
+
+export function winptyCompatInit(terminal: Terminal): void {
+  const addonTerminal = <IWinptyCompatAddonTerminal>terminal;
+
+  // Don't do anything when the platform is not Windows
+  const isWindows = ['Windows', 'Win16', 'Win32', 'WinCE'].indexOf(navigator.platform) >= 0;
+  if (!isWindows) {
+    return;
+  }
+
+  // Winpty does not support wraparound mode which means that lines will never
+  // be marked as wrapped. This causes issues for things like copying a line
+  // retaining the wrapped new line characters or if consumers are listening
+  // in on the data stream.
+  //
+  // The workaround for this is to listen to every incoming line feed and mark
+  // the line as wrapped if the last character in the previous line is not a
+  // space. This is certainly not without its problems, but generally on
+  // Windows when text reaches the end of the terminal it's likely going to be
+  // wrapped.
+  addonTerminal.on('linefeed', () => {
+    const line = addonTerminal.buffer.lines.get(addonTerminal.buffer.ybase + addonTerminal.buffer.y - 1);
+    const lastChar = line[addonTerminal.cols - 1];
+
+    if (lastChar[3] !== 32 /* ' ' */) {
+      const nextLine = addonTerminal.buffer.lines.get(addonTerminal.buffer.ybase + addonTerminal.buffer.y);
+      (<any>nextLine).isWrapped = true;
     }
-
-    // Winpty does not support wraparound mode which means that lines will never
-    // be marked as wrapped. This causes issues for things like copying a line
-    // retaining the wrapped new line characters or if consumers are listening
-    // in on the data stream.
-    //
-    // The workaround for this is to listen to every incoming line feed and mark
-    // the line as wrapped if the last character in the previous line is not a
-    // space. This is certainly not without its problems, but generally on
-    // Windows when text reaches the end of the terminal it's likely going to be
-    // wrapped.
-    terminal.on('linefeed', () => {
-      const line = terminal.buffer.lines.get(terminal.buffer.ybase + terminal.buffer.y - 1);
-      const lastChar = line[terminal.cols - 1];
-
-      if (lastChar[3] !== 32 /* ' ' */) {
-        const nextLine = terminal.buffer.lines.get(terminal.buffer.ybase + terminal.buffer.y);
-        (<any>nextLine).isWrapped = true;
-      }
-    });
+  });
 }
 
-export function apply(terminalConstructor: any): void {
-  terminalConstructor.prototype.winptyCompatInit = function(): void {
+export function apply(terminalConstructor: typeof Terminal): void {
+  (<any>terminalConstructor.prototype).winptyCompatInit = function (): void {
     winptyCompatInit(this);
   };
 }
diff --git a/src/addons/zmodem/zmodem.test.ts b/src/addons/zmodem/zmodem.test.ts
index 7646b7cc..682e62c8 100644
--- a/src/addons/zmodem/zmodem.test.ts
+++ b/src/addons/zmodem/zmodem.test.ts
@@ -12,7 +12,7 @@ class MockTerminal {}
 describe('zmodem addon', () => {
   describe('apply', () => {
     it('should do register the `zmodemAttach` method and `zmodemBrowser` attribute', () => {
-      zmodem.apply(MockTerminal);
+      zmodem.apply(<any>MockTerminal);
       assert.equal(typeof (<any>MockTerminal).prototype.zmodemAttach, 'function');
       assert.equal(typeof (<any>MockTerminal).prototype.zmodemBrowser, 'object');
     });
diff --git a/src/addons/zmodem/zmodem.ts b/src/addons/zmodem/zmodem.ts
index 4713f111..e8a7824d 100644
--- a/src/addons/zmodem/zmodem.ts
+++ b/src/addons/zmodem/zmodem.ts
@@ -1,3 +1,12 @@
+/**
+ * Copyright (c) 2017 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+/// <reference path="../../../typings/xterm.d.ts"/>
+
+import { Terminal } from 'xterm';
+
 /**
  *
  * Allow xterm.js to handle ZMODEM uploads and downloads.
@@ -33,7 +42,7 @@ export interface IZModemOptions {
   noTerminalWriteOutsideSession?: boolean;
 }
 
-export function zmodemAttach(term: any, ws: WebSocket, opts: IZModemOptions = {}): void {
+export function zmodemAttach(term: Terminal, ws: WebSocket, opts: IZModemOptions = {}): void {
   const senderFunc = (octets: ArrayLike<number>) => ws.send(new Uint8Array(octets));
 
   let zsentry;
@@ -51,8 +60,8 @@ export function zmodemAttach(term: any, ws: WebSocket, opts: IZModemOptions = {}
       }
     },
     sender: senderFunc,
-    on_retract: () => term.emit('zmodemRetract'),
-    on_detect: (detection: any) => term.emit('zmodemDetect', detection)
+    on_retract: () => (<any>term).emit('zmodemRetract'),
+    on_detect: (detection: any) => (<any>term).emit('zmodemDetect', detection)
   });
 
   function handleWSMessage(evt: MessageEvent): void {
@@ -75,9 +84,9 @@ export function zmodemAttach(term: any, ws: WebSocket, opts: IZModemOptions = {}
   ws.addEventListener('message', handleWSMessage);
 }
 
-export function apply(terminalConstructor: any): void {
+export function apply(terminalConstructor: typeof Terminal): void {
   zmodem = (typeof window === 'object') ? (<any>window).ZModem : {Browser: null};  // Nullify browser for tests
 
-  terminalConstructor.prototype.zmodemAttach = zmodemAttach.bind(this, this);
-  terminalConstructor.prototype.zmodemBrowser = zmodem.Browser;
+  (<any>terminalConstructor.prototype).zmodemAttach = zmodemAttach.bind(this, this);
+  (<any>terminalConstructor.prototype).zmodemBrowser = zmodem.Browser;
 }