diff --git a/backbone/backbone.d.ts b/backbone/backbone.d.ts
index 0635a1247..1a6f3d8fe 100644
--- a/backbone/backbone.d.ts
+++ b/backbone/backbone.d.ts
@@ -67,7 +67,7 @@ declare module Backbone {
     }
 
     class Events {
-        on(eventName: string, callback: (...args: any[]) => void , context?: any): any;
+        on(eventName: any, callback: (...args: any[]) => void , context?: any): any;
         off(eventName?: string, callback?: (...args: any[]) => void , context?: any): any;
         trigger(eventName: string, ...args: any[]): any;
         bind(eventName: string, callback: (...args: any[]) => void , context?: any): any;
diff --git a/jointjs/jointjs.d.ts b/jointjs/jointjs.d.ts
index d3e6a204e..547263021 100644
--- a/jointjs/jointjs.d.ts
+++ b/jointjs/jointjs.d.ts
@@ -77,7 +77,7 @@ declare module joint {
             snapToGrid(p): { x: number; y: number; };
         }
 
-        class ElementView {
+        class ElementView extends CellView  {
             scale(sx: number, sy: number);
         }
         class CellView extends Backbone.View {
@@ -110,6 +110,6 @@ declare module joint {
         function mixin(objects: any[]): any;
         function supplement(objects: any[]): any;
         function deepMixin(objects: any[]): any;
-        function deepSupplement(objects: any[]): any;
+        function deepSupplement(objects: any[], defaultIndicator?: any): any;
     }
 }
\ No newline at end of file