diff --git a/DropDown/src/DropDown.swift b/DropDown/src/DropDown.swift
index f41e8dd..9139e63 100644
--- a/DropDown/src/DropDown.swift
+++ b/DropDown/src/DropDown.swift
@@ -20,7 +20,7 @@ private typealias ComputeLayoutTuple = (x: CGFloat, y: CGFloat, width: CGFloat,
 
 /// Can be `UIView` or `UIBarButtonItem`.
 @objc
-public protocol AnchorView: class {
+public protocol AnchorView: AnyObject {
 
 	var plainView: UIView { get }