diff --git a/createjs/createjs.d.ts b/createjs/createjs.d.ts
index 9e66e79ee..7e6be561a 100644
--- a/createjs/createjs.d.ts
+++ b/createjs/createjs.d.ts
@@ -65,19 +65,19 @@ declare module createjs {
         constructor();
 
         // methods
-        addEventListener(type: string, listener: Function, useCapture?: boolean): any;
+        addEventListener(type: string, listener: (eventObj: Object) => any, useCapture?: boolean): any;
         addEventListener(type: string, listener: Object, useCapture?: boolean): any;
         dispatchEvent(eventObj: Object, target?: Object): boolean;
         dispatchEvent(eventObj: string, target?: Object): boolean;
         dispatchEvent(eventObj: Event, target?: Object): boolean;
         hasEventListener(type: string): boolean;
         static initialize(target: Object): void;
-        off(type: string, listener: Function, useCapture?: boolean): void;
+        off(type: string, listener: (eventObj: Object) => any, useCapture?: boolean): void;
         off(type: string, listener: Object, useCapture?: boolean): void;
-        on(type: string, listener, scope?: Function, once?: boolean, data?: any, useCapture?: boolean): Function;
-        on(type: string, listener, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
+        on(type: string, listener: (eventObj: Object) => any, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
+        on(type: string, listener: Object, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
         removeAllEventListeners(type?: string): void;
-        removeEventListener(type: string, listener: Function, useCapture?: boolean): void;
+        removeEventListener(type: string, listener: (eventObj: Object) => any, useCapture?: boolean): void;
         removeEventListener(type: string, listener: Object, useCapture?: boolean): void;
         toString(): string;
     }
diff --git a/easeljs/easeljs-tests.ts b/easeljs/easeljs-tests.ts
index 268e7381e..75eabca23 100644
--- a/easeljs/easeljs-tests.ts
+++ b/easeljs/easeljs-tests.ts
@@ -30,7 +30,7 @@ function test_animation() {
     ss.getAnimation("run").next = "jump";
     ss.getAnimation("jump").next = "run";
 
-    var sprite = new createjs.Sprite(ss);
+    var sprite:createjs.Sprite = new createjs.Sprite(ss);
     sprite.scaleY = sprite.scaleX = .4;
 
     sprite.gotoAndPlay("run");
diff --git a/easeljs/easeljs.d.ts b/easeljs/easeljs.d.ts
index cdc798f63..d72dfa14c 100644
--- a/easeljs/easeljs.d.ts
+++ b/easeljs/easeljs.d.ts
@@ -398,7 +398,7 @@ declare module createjs {
 
         // properties
         static BASE_64: Object;
-        static Command: Function;
+        static Command: any;
         static STROKE_CAPS_MAP: string[];
         static STROKE_JOINTS_MAP: string[];
 
@@ -431,7 +431,7 @@ declare module createjs {
         endStroke(): Graphics;
         static getHSL(hue: number, saturation: number, lightness: number, alpha?: number): string;
         static getRGB(r: number, g: number, b: number, alpha?: number): string;
-        inject(callback: Function,  data: Object): Graphics;
+        inject(callback: (data: any) => any,  data: any): Graphics;
         isEmpty(): boolean;
         lineTo(x: number, y: number): Graphics;
         moveTo(x: number, y: number): Graphics;
@@ -540,22 +540,6 @@ declare module createjs {
         clone(): MouseEvent;
         toString(): string;
         
-        // EventDispatcher mixins
-        addEventListener(type: string, listener: Function, useCapture?: boolean): any;
-        addEventListener(type: string, listener: Object, useCapture?: boolean): any;
-        dispatchEvent(eventObj: Object, target?: Object): boolean;
-        dispatchEvent(eventObj: string, target?: Object): boolean;
-        dispatchEvent(eventObj: Event, target?: Object): boolean;
-        hasEventListener(type: string): boolean;
-        static initialize(target: Object): void;
-        off(type: string, listener: Function, useCapture?: boolean): void;
-        off(type: string, listener: Object, useCapture?: boolean): void;
-        on(type: string, listener, scope?: Function, once?: boolean, data?: any, useCapture?: boolean): Function;
-        on(type: string, listener, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
-        removeAllEventListeners(type?: string): void;
-        removeEventListener(type: string, listener: Function, useCapture?: boolean): void;
-        removeEventListener(type: string, listener: Object, useCapture?: boolean): void;
-
         // events
         /*
         mousemove: (event: MouseEvent) => any; // deprecated
@@ -664,8 +648,8 @@ declare module createjs {
 
 
     export class Sprite extends DisplayObject {
-        constructor(spriteSheet: SpriteSheet, frameOrAnimation: string);
-        constructor(spriteSheet: SpriteSheet, frameOrAnimation: number);
+        constructor(spriteSheet: SpriteSheet, frameOrAnimation?: string);
+        constructor(spriteSheet: SpriteSheet, frameOrAnimation?: number);
 
         // properties
         currentAnimation: string;
@@ -861,18 +845,18 @@ declare module createjs {
         static setPaused(value: boolean): void;
 
         // EventDispatcher mixins
-        static addEventListener(type: string, listener: Function, useCapture?: boolean): any;
+        static addEventListener(type: string, listener: (eventObj: Object) => any, useCapture?: boolean): any;
         static addEventListener(type: string, listener: Object, useCapture?: boolean): any;
         static dispatchEvent(eventObj: Object, target?: Object): boolean;
         static dispatchEvent(eventObj: string, target?: Object): boolean;
         static dispatchEvent(eventObj: Event, target?: Object): boolean;
         static hasEventListener(type: string): boolean;
-        static off(type: string, listener: Function, useCapture?: boolean): void;
+        static off(type: string, listener: (eventObj: Object) => any, useCapture?: boolean): void;
         static off(type: string, listener: Object, useCapture?: boolean): void;
-        static on(type: string, listener, scope?: Function, once?: boolean, data?: any, useCapture?: boolean): Function;
-        static on(type: string, listener, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
+        static on(type: string, listener: (eventObj: Object) => any, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
+        static on(type: string, listener: Object, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
         static removeAllEventListeners(type?: string): void;
-        static removeEventListener(type: string, listener: Function, useCapture?: boolean): void;
+        static removeEventListener(type: string, listener: (eventObj: Object) => any, useCapture?: boolean): void;
         static removeEventListener(type: string, listener: Object, useCapture?: boolean): void;
 
         // events
diff --git a/preloadjs/preloadjs.d.ts b/preloadjs/preloadjs.d.ts
index 3ac27237d..21ace1154 100644
--- a/preloadjs/preloadjs.d.ts
+++ b/preloadjs/preloadjs.d.ts
@@ -65,7 +65,7 @@ declare module createjs {
         // methods
         getItem(value: string): Object;
         getResult(value: string, rawResult?: boolean): Object;
-        installPlugin(plugin: Function): void;
+        installPlugin(plugin: any): void;
         loadFile(file: Object, loadNow?: boolean, basePath?: string): void;
         loadFile(file: string, loadNow?: boolean, basePath?: string): void;
         loadManifest(manifest: Object[], loadNow?: boolean, basePath?: string): void;
diff --git a/soundjs/soundjs-tests.ts b/soundjs/soundjs-tests.ts
index 419587c25..fed2f37ff 100644
--- a/soundjs/soundjs-tests.ts
+++ b/soundjs/soundjs-tests.ts
@@ -5,7 +5,7 @@
 // Feature set example: 
 createjs.Sound.addEventListener("fileload", createjs.proxy(this.loadHandler, this));
 createjs.Sound.registerSound("path/to/mySound.mp3|path/to/mySound.ogg", "sound");
-function loadHandler(event) {
+function loadHandler(event):void {
     // This is fired for each sound that is registered.
     var instance = createjs.Sound.play("sound");  // play using id.  Could also use full sourcepath or event.src.
     instance.addEventListener("complete", createjs.proxy(this.handleComplete, this));
diff --git a/soundjs/soundjs.d.ts b/soundjs/soundjs.d.ts
index 27b505501..d5836d3ef 100644
--- a/soundjs/soundjs.d.ts
+++ b/soundjs/soundjs.d.ts
@@ -122,19 +122,19 @@ declare module createjs {
         */
 
         // EventDispatcher mixins
-        static addEventListener(type: string, listener: Function, useCapture?: boolean): any;
+        static addEventListener(type: string, listener: (eventObj: Object) => any, useCapture?: boolean): any;
         static addEventListener(type: string, listener: Object, useCapture?: boolean): any;
         static dispatchEvent(eventObj: Object, target?: Object): boolean;
         static dispatchEvent(eventObj: string, target?: Object): boolean;
         static dispatchEvent(eventObj: Event, target?: Object): boolean;
         static hasEventListener(type: string): boolean;
-        static off(type: string, listener: Function, useCapture?: boolean): void;
+        static off(type: string, listener: (eventObj: Object) => any, useCapture?: boolean): void;
         static off(type: string, listener: Object, useCapture?: boolean): void;
-        static on(type: string, listener, scope?: Function, once?: boolean, data?: any, useCapture?: boolean): Function;
-        static on(type: string, listener, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
-        static removeEventListener(type: string, listener: Function, useCapture?: boolean): void;
-        static removeEventListener(type: string, listener: Object, useCapture?: boolean): void;
+        static on(type: string, listener: (eventObj: Object) => any, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
+        static on(type: string, listener: Object, scope?: Object, once?: boolean, data?: any, useCapture?: boolean): Function;
         static removeAllEventListeners(type?: string): void;
+        static removeEventListener(type: string, listener: (eventObj: Object) => any, useCapture?: boolean): void;
+        static removeEventListener(type: string, listener: Object, useCapture?: boolean): void;
 
     }
     
@@ -211,6 +211,6 @@ declare module createjs {
         removeFromPreload(src: string): void;
         removeSound(src: string): void;
         setMute(value: boolean): boolean;
-        setVolume(value: Number): boolean;
+        setVolume(value: number): boolean;
     }
 }
diff --git a/tweenjs/tweenjs-tests.ts b/tweenjs/tweenjs-tests.ts
index 2eeef2f90..63b0752e9 100644
--- a/tweenjs/tweenjs-tests.ts
+++ b/tweenjs/tweenjs-tests.ts
@@ -1,6 +1,7 @@
 ///<reference path="./tweenjs.d.ts"/>
+///<reference path="../easeljs/easeljs.d.ts"/>
 
-declare var target;
+var target: createjs.DisplayObject = new createjs.DisplayObject();
 var Tween = createjs.Tween; 
 
 // source : http://www.createjs.com/Docs/TweenJS/modules/TweenJS.html
diff --git a/tweenjs/tweenjs.d.ts b/tweenjs/tweenjs.d.ts
index 171642e6e..a1e622c5a 100644
--- a/tweenjs/tweenjs.d.ts
+++ b/tweenjs/tweenjs.d.ts
@@ -142,7 +142,7 @@ declare module createjs {
         target: Object;
 
         // methods
-        call(callback: Function, params?: any[], scope?: Object): Tween;
+        call(callback: (...params: any[]) => any, params?: any[], scope?: Object): Tween;
         static get(target: Object, props?: Object, pluginData?: Object, override?: boolean): Tween;
         static hasActiveTweens(target?: Object): boolean;
         static installPlugin(plugin: Object, properties: any[]): void;