diff --git a/.swiftpm/xcode/package.xcworkspace/xcuserdata/fumiyatanaka.xcuserdatad/UserInterfaceState.xcuserstate b/.swiftpm/xcode/package.xcworkspace/xcuserdata/fumiyatanaka.xcuserdatad/UserInterfaceState.xcuserstate
index d0e6b89a..766b66b1 100644
Binary files a/.swiftpm/xcode/package.xcworkspace/xcuserdata/fumiyatanaka.xcuserdatad/UserInterfaceState.xcuserstate and b/.swiftpm/xcode/package.xcworkspace/xcuserdata/fumiyatanaka.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/Examples/DemoApp.xcodeproj/project.xcworkspace/xcuserdata/fumiyatanaka.xcuserdatad/UserInterfaceState.xcuserstate b/Examples/DemoApp.xcodeproj/project.xcworkspace/xcuserdata/fumiyatanaka.xcuserdatad/UserInterfaceState.xcuserstate
index 06b5f162..4e44f32b 100644
Binary files a/Examples/DemoApp.xcodeproj/project.xcworkspace/xcuserdata/fumiyatanaka.xcuserdatad/UserInterfaceState.xcuserstate and b/Examples/DemoApp.xcodeproj/project.xcworkspace/xcuserdata/fumiyatanaka.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/Examples/Shared/DemoApp.swift b/Examples/Shared/DemoApp.swift
index 6df2cff1..d4ed81d5 100644
--- a/Examples/Shared/DemoApp.swift
+++ b/Examples/Shared/DemoApp.swift
@@ -17,8 +17,10 @@ struct DemoApp: App {
     var body: some Scene {
         WindowGroup {
             /// please change ``DemoApp/roulette`` and ``DemoApp/content``
-            roulette.navigationTitle(title)
-            // content
+            NavigationView {
+                roulette.navigationTitle(title)
+            }
+//             content
         }
     }
 
diff --git a/Sources/SimpleRoulette/Sources/Pie/RouletteInternalView.swift b/Sources/SimpleRoulette/Sources/Pie/RouletteInternalView.swift
index 8c445f59..f8ed51d7 100644
--- a/Sources/SimpleRoulette/Sources/Pie/RouletteInternalView.swift
+++ b/Sources/SimpleRoulette/Sources/Pie/RouletteInternalView.swift
@@ -60,8 +60,10 @@ public struct RouletteInternalView: View {
                 }
             }
             ForEach(model.parts, id: \.self) { (part) -> ZStack in
+                let angle = ((part.endAngle + part.startAngle) / 2) + Angle(degrees: 90)
                 ZStack {
                     part.content.view
+                        .rotationEffect(angle)
                         .offset(
                             CGSize(
                                 width: { () -> Double in