diff --git a/Demo/SwiftyCropDemo/ContentView.swift b/Demo/SwiftyCropDemo/ContentView.swift
index f4e90ee..f4081a2 100644
--- a/Demo/SwiftyCropDemo/ContentView.swift
+++ b/Demo/SwiftyCropDemo/ContentView.swift
@@ -82,7 +82,7 @@ struct ContentView: View {
                             .frame(maxWidth: .infinity, alignment: .leading)
                         
                         Button {
-                            maskRadius = UIScreen.main.bounds.width / 2
+                            maskRadius = min(UIScreen.main.bounds.width, UIScreen.main.bounds.height) / 2
                         } label: {
                             Image(systemName: "arrow.up.left.and.arrow.down.right")
                                 .font(.footnote)
@@ -135,7 +135,9 @@ struct ContentView: View {
     
     // Example function for downloading an image
     private func downloadExampleImage() async -> UIImage? {
-        let urlString = "https://picsum.photos/1000/1200"
+        let portraitUrlString = "https://picsum.photos/1000/1200"
+        let landscapeUrlString = "https://picsum.photos/2000/1000"
+        let urlString = Int.random(in: 0...1) == 0 ? portraitUrlString : landscapeUrlString
         guard let url = URL(string: urlString),
               let (data, _) = try? await URLSession.shared.data(from: url),
               let image = UIImage(data: data)
diff --git a/Sources/SwiftyCrop/Models/CropViewModel.swift b/Sources/SwiftyCrop/Models/CropViewModel.swift
index 9d5e16d..869d4f8 100644
--- a/Sources/SwiftyCrop/Models/CropViewModel.swift
+++ b/Sources/SwiftyCrop/Models/CropViewModel.swift
@@ -3,8 +3,12 @@ import UIKit
 
 class CropViewModel: ObservableObject {
     private let maxMagnificationScale: CGFloat
-    var imageSizeInView: CGSize = .zero
-    var maskRadius: CGFloat
+    var imageSizeInView: CGSize = .zero {
+        didSet {
+            maskRadius = min(maskRadius, min(imageSizeInView.width, imageSizeInView.height) / 2)
+        }
+    }
+    @Published var maskRadius: CGFloat
 
     @Published var scale: CGFloat = 1.0
     @Published var lastScale: CGFloat = 1.0