diff --git a/AKImageCropperView/AKImageCropperOverlayView.swift b/AKImageCropperView/AKImageCropperOverlayView.swift
index 12fc350..22b9b1e 100644
--- a/AKImageCropperView/AKImageCropperOverlayView.swift
+++ b/AKImageCropperView/AKImageCropperOverlayView.swift
@@ -23,7 +23,7 @@
 
 import UIKit
 
-protocol AKImageCropperOverlayViewDelegate : class {
+protocol AKImageCropperOverlayViewDelegate : AnyObject {
     func cropperOverlayViewDidChangeCropRect(_ view: AKImageCropperOverlayView, _ cropRect: CGRect)
 }