diff --git a/example/lib/main.dart b/example/lib/main.dart
index a594afe..420dd77 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -127,13 +127,13 @@ class _CropSampleState extends State<CropSample> {
                             switch (result) {
                               case CropSuccess(:final croppedImage):
                                 _croppedData = croppedImage;
-                              case CropFailure(:final error):
+                              case CropFailure(:final cause):
                                 showDialog(
                                   context: context,
                                   builder: (context) => AlertDialog(
                                     title: Text('Error'),
                                     content:
-                                        Text('Failed to crop image: ${error}'),
+                                        Text('Failed to crop image: ${cause}'),
                                     actions: [
                                       TextButton(
                                           onPressed: () =>
diff --git a/lib/src/logic/cropper/errors.dart b/lib/src/logic/cropper/errors.dart
index f1f6cea..d104d57 100644
--- a/lib/src/logic/cropper/errors.dart
+++ b/lib/src/logic/cropper/errors.dart
@@ -1,6 +1,6 @@
 import 'dart:ui';
 
-class NegativeSizeError extends Error {
+class NegativeSizeError implements Exception {
   final Offset topLeft;
   final Offset bottomRight;
 
@@ -10,7 +10,7 @@ class NegativeSizeError extends Error {
   });
 }
 
-class InvalidRectError extends Error {
+class InvalidRectError implements Exception {
   final Offset topLeft;
   final Offset bottomRight;
 
diff --git a/lib/src/logic/cropper/image_cropper.dart b/lib/src/logic/cropper/image_cropper.dart
index 1b5ec0b..4898df8 100644
--- a/lib/src/logic/cropper/image_cropper.dart
+++ b/lib/src/logic/cropper/image_cropper.dart
@@ -51,7 +51,7 @@ abstract class ImageCropper<T> {
   CircleCropper<T> get circleCropper;
 }
 
-typedef RectValidator<T> = Error? Function(
+typedef RectValidator<T> = Exception? Function(
     T original, Offset topLeft, Offset bottomRight);
 typedef RectCropper<T> = Uint8List Function(
   T original, {
diff --git a/lib/src/logic/parser/errors.dart b/lib/src/logic/parser/errors.dart
index 3196a8d..a008781 100644
--- a/lib/src/logic/parser/errors.dart
+++ b/lib/src/logic/parser/errors.dart
@@ -1,6 +1,6 @@
 import 'package:crop_your_image/src/logic/format_detector/format.dart';
 
-class InvalidInputFormatError extends Error {
+class InvalidInputFormatError implements Exception {
   final ImageFormat? inputFormat;
 
   InvalidInputFormatError(this.inputFormat);
diff --git a/lib/src/widget/crop_result.dart b/lib/src/widget/crop_result.dart
index fdab479..dd40896 100644
--- a/lib/src/widget/crop_result.dart
+++ b/lib/src/widget/crop_result.dart
@@ -12,7 +12,7 @@ class CropSuccess extends CropResult {
 }
 
 class CropFailure extends CropResult {
-  const CropFailure(this.error, [this.stackTrace]);
-  final Object error;
+  const CropFailure(this.cause, [this.stackTrace]);
+  final Object cause;
   final StackTrace? stackTrace;
-}
\ No newline at end of file
+}