diff --git a/angularjs/angular-animate.d.ts b/angularjs/angular-animate.d.ts
index f68cd60d14..60f595672f 100644
--- a/angularjs/angular-animate.d.ts
+++ b/angularjs/angular-animate.d.ts
@@ -43,7 +43,7 @@ declare namespace angular.animate {
          * @param container the container element that will capture each of the animation events that are fired on itself as well as among its children
          * @param callback the callback function that will be fired when the listener is triggered
          */
-        on(event: string, container: JQuery, callback: Function): void;
+        on(event: string, container: JQuery, callback: (element?: JQuery, phase?: string) => any): void;
 
         /**
          * Deregisters an event listener based on the event which has been associated with the provided element.
@@ -52,7 +52,7 @@ declare namespace angular.animate {
          * @param container the container element the event listener was placed on
          * @param callback the callback function that was registered as the listener
          */
-        off(event: string, container?: JQuery, callback?: Function): void;
+        off(event: string, container?: JQuery, callback?: (element?: JQuery, phase?: string) => any): void;
 
         /**
          * Associates the provided element with a host parent element to allow the element to be animated even if it exists outside of the DOM structure of the Angular application.