diff --git a/samples/Thinktecture.Blazor.Sample/Components/UserCard.razor b/samples/Thinktecture.Blazor.Sample/Components/UserCard.razor
index de33c03..2adca51 100644
--- a/samples/Thinktecture.Blazor.Sample/Components/UserCard.razor
+++ b/samples/Thinktecture.Blazor.Sample/Components/UserCard.razor
@@ -12,4 +12,4 @@
         <span>@User.Address.City</span>
         <span>@User.Address.Country</span>
     </div>
-</div>
\ No newline at end of file
+</div>
diff --git a/samples/Thinktecture.Blazor.Sample/Pages/ViewTransitions.razor.cs b/samples/Thinktecture.Blazor.Sample/Pages/ViewTransitions.razor.cs
index 7c3dfbb..783a9f3 100644
--- a/samples/Thinktecture.Blazor.Sample/Pages/ViewTransitions.razor.cs
+++ b/samples/Thinktecture.Blazor.Sample/Pages/ViewTransitions.razor.cs
@@ -1,4 +1,3 @@
-using System.Net.Http.Json;
 using Fluxor;
 using Microsoft.AspNetCore.Components;
 using Thinktecture.Blazor.Sample.Models;
diff --git a/samples/Thinktecture.Blazor.Sample/Program.cs b/samples/Thinktecture.Blazor.Sample/Program.cs
index a728534..cfe67df 100644
--- a/samples/Thinktecture.Blazor.Sample/Program.cs
+++ b/samples/Thinktecture.Blazor.Sample/Program.cs
@@ -6,6 +6,7 @@
 using Thinktecture.Blazor.FileHandling;
 using Thinktecture.Blazor.PwaUpdate;
 using Thinktecture.Blazor.Sample;
+using Thinktecture.Blazor.ScreenWakeLock;
 using Thinktecture.Blazor.ViewTransitions;
 using Thinktecture.Blazor.WebShare;
 
@@ -25,6 +26,6 @@
 builder.Services.AddWebShareService();
 builder.Services.AddUpdateService();
 builder.Services.AddScreenWakeLockService();
-builder.Services.AddViewTransitionServices();
+builder.Services.AddViewTransitionService();
 
 await builder.Build().RunAsync();
diff --git a/src/Thinktecture.Blazor.ViewTransitions/ViewTransitionService.cs b/src/Thinktecture.Blazor.ViewTransitions/ViewTransitionService.cs
index d3228fd..a476ce0 100644
--- a/src/Thinktecture.Blazor.ViewTransitions/ViewTransitionService.cs
+++ b/src/Thinktecture.Blazor.ViewTransitions/ViewTransitionService.cs
@@ -7,7 +7,7 @@ public class ViewTransitionService : IViewTransitionService
     private readonly Lazy<ValueTask<IJSInProcessObjectReference>> _moduleTask;
     private TaskCompletionSource _oldViewStateCompleted = new(TaskCreationOptions.RunContinuationsAsynchronously);
     private Task? _beforeTransition;
-    private SemaphoreSlim _semaphore;
+    private SemaphoreSlim? _semaphore;
 
 
     public ViewTransitionService(IJSRuntime jSRuntime)