diff --git a/AAInfographics/AAChartCreator/AASerializable.swift b/AAInfographics/AAChartCreator/AASerializable.swift
index 4257d73..6e6ac27 100755
--- a/AAInfographics/AAChartCreator/AASerializable.swift
+++ b/AAInfographics/AAChartCreator/AASerializable.swift
@@ -34,13 +34,10 @@ import Foundation
 
 open class AAObject {
     public init() {}
-}
 
-@available(iOS 10.0, macCatalyst 13.1, macOS 10.13, *)
-public extension AAObject {
-    var classNameString: String {
-        let nameClass: AnyClass! = object_getClass(self)
-        return NSStringFromClass(nameClass)
+    @available(iOS 10.0, macCatalyst 13.1, macOS 10.13, *)
+    open var classNameString: String {
+        return String(describing: type(of: self))
     }
 }