diff --git a/Example/ImagePicker.swift b/Example/ImagePicker.swift
index 5bed8ab7..577e6a50 100644
--- a/Example/ImagePicker.swift
+++ b/Example/ImagePicker.swift
@@ -8,7 +8,7 @@
 
 import UIKit
 
-public protocol ImagePickerDelegate: class {
+public protocol ImagePickerDelegate: AnyObject {
     func didSelect(image: UIImage?)
 }
 
diff --git a/Sources/Mantis/CropView/CropView.swift b/Sources/Mantis/CropView/CropView.swift
index a991adef..b3925ba5 100644
--- a/Sources/Mantis/CropView/CropView.swift
+++ b/Sources/Mantis/CropView/CropView.swift
@@ -24,7 +24,7 @@
 
 import UIKit
 
-protocol CropViewDelegate: class {
+protocol CropViewDelegate: AnyObject {
     func cropViewDidBecomeResettable(_ cropView: CropView)
     func cropViewDidBecomeUnResettable(_ cropView: CropView)
     func cropViewDidBeginResize(_ cropView: CropView)
diff --git a/Sources/Mantis/CropViewController/CropToolbarProtocol.swift b/Sources/Mantis/CropViewController/CropToolbarProtocol.swift
index 51baca70..b0c9fd95 100644
--- a/Sources/Mantis/CropViewController/CropToolbarProtocol.swift
+++ b/Sources/Mantis/CropViewController/CropToolbarProtocol.swift
@@ -7,7 +7,7 @@
 
 import UIKit
 
-public protocol CropToolbarDelegate: class {
+public protocol CropToolbarDelegate: AnyObject {
     func didSelectCancel()
     func didSelectCrop()
     func didSelectCounterClockwiseRotate()
diff --git a/Sources/Mantis/CropViewController/CropViewController.swift b/Sources/Mantis/CropViewController/CropViewController.swift
index 9d8530aa..90fb6030 100644
--- a/Sources/Mantis/CropViewController/CropViewController.swift
+++ b/Sources/Mantis/CropViewController/CropViewController.swift
@@ -24,7 +24,7 @@
 
 import UIKit
 
-public protocol CropViewControllerDelegate: class {
+public protocol CropViewControllerDelegate: AnyObject {
     func cropViewControllerDidCrop(_ cropViewController: CropViewController,
                                    cropped: UIImage, transformation: Transformation)
     func cropViewControllerDidFailToCrop(_ cropViewController: CropViewController, original: UIImage)