diff --git a/jquery-cropbox/jquery-cropbox-tests.ts b/jquery-cropbox/jquery-cropbox-tests.ts
index e8db3847c..270802cd9 100644
--- a/jquery-cropbox/jquery-cropbox-tests.ts
+++ b/jquery-cropbox/jquery-cropbox-tests.ts
@@ -37,3 +37,9 @@ cropboxWithOptions.update();
 cropboxWithOptions.getDataURL();
 cropboxWithOptions.getBlob();
 cropboxWithOptions.remove();
+
+cropboxWithOptions.on("cropbox",(e: Event, data: any, img: jQueryCropBox.Cropbox) => {
+   
+   //DoStuff 
+    
+});
\ No newline at end of file
diff --git a/jquery-cropbox/jquery-cropbox.d.ts b/jquery-cropbox/jquery-cropbox.d.ts
index 82b550bf3..9f91e06a2 100644
--- a/jquery-cropbox/jquery-cropbox.d.ts
+++ b/jquery-cropbox/jquery-cropbox.d.ts
@@ -103,7 +103,13 @@ declare module jQueryCropBox {
          * Remove the cropbox functionality from the image.      
          */
         remove(): void;
+        /**
+             * Attach an event handler function for one event on the Crop Box      
+             */
+        on(event: string, callback: jQueryCropBox.EventCallback): void;
     }
+
+    type EventCallback = (e: Event, data: any, img: jQueryCropBox.Cropbox) => void;
 }
 
 interface JQuery {