diff --git a/web/backend/API/API.Core/API.Core.csproj b/web/backend/API/API.Core/API.Core.csproj
index f81e1a84..19544d6c 100644
--- a/web/backend/API/API.Core/API.Core.csproj
+++ b/web/backend/API/API.Core/API.Core.csproj
@@ -15,7 +15,7 @@
         <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.11" />
         <PackageReference Include="Swashbuckle.AspNetCore" Version="6.6.2" />
         <PackageReference Include="FluentValidation.AspNetCore" Version="11.3.0" />
-        <PackageReference Include="MediatR" Version="12.4.1" />
+        <PackageReference Include="MediatR" Version="12.5.0" />
     </ItemGroup>
 
     <ItemGroup>
diff --git a/web/backend/Database/Database.Seed/Database.Seed.csproj b/web/backend/Database/Database.Seed/Database.Seed.csproj
index 3e306666..a50a0640 100644
--- a/web/backend/Database/Database.Seed/Database.Seed.csproj
+++ b/web/backend/Database/Database.Seed/Database.Seed.csproj
@@ -9,7 +9,7 @@
 
     <ItemGroup>
         <PackageReference Include="idunno.Password.Generator" Version="2.0.0" />
-        <PackageReference Include="MediatR" Version="12.4.1" />
+        <PackageReference Include="MediatR" Version="12.5.0" />
         <PackageReference Include="Microsoft.Data.SqlClient" Version="7.0.2" />
         <PackageReference Include="Microsoft.Data.Sqlite" Version="10.0.11" />
         <PackageReference Include="SkiaSharp" Version="4.151.1" />
diff --git a/web/backend/Shared/Shared.Application.Tests/Behaviors/UnhandledExceptionLoggingBehaviorTests.cs b/web/backend/Shared/Shared.Application.Tests/Behaviors/UnhandledExceptionLoggingBehaviorTests.cs
index 5514233a..1a056d8d 100644
--- a/web/backend/Shared/Shared.Application.Tests/Behaviors/UnhandledExceptionLoggingBehaviorTests.cs
+++ b/web/backend/Shared/Shared.Application.Tests/Behaviors/UnhandledExceptionLoggingBehaviorTests.cs
@@ -26,7 +26,7 @@ public class UnhandledExceptionLoggingBehaviorTests
         UnhandledExceptionLoggingBehavior<TestRequest, TestResponse> behavior = CreateBehavior();
         TestRequest request = new("aaron", "pa$$word123");
         InvalidOperationException thrown = new("Something went wrong.");
-        RequestHandlerDelegate<TestResponse> next = () => throw thrown;
+        Task<TestResponse> next(CancellationToken _ = default) => throw thrown;
 
         Func<Task> act = async () => await behavior.Handle(request, next, CancellationToken.None);
 
@@ -42,7 +42,7 @@ public class UnhandledExceptionLoggingBehaviorTests
         UnhandledExceptionLoggingBehavior<TestRequest, TestResponse> behavior = CreateBehavior();
         TestRequest request = new("aaron", "pa$$word123");
         ValidationException thrown = new([new ValidationFailure("Username", "is required")]);
-        RequestHandlerDelegate<TestResponse> next = () => throw thrown;
+        Task<TestResponse> next(CancellationToken _ = default) => throw thrown;
 
         Func<Task> act = async () => await behavior.Handle(request, next, CancellationToken.None);
 
@@ -56,7 +56,7 @@ public class UnhandledExceptionLoggingBehaviorTests
         UnhandledExceptionLoggingBehavior<TestRequest, TestResponse> behavior = CreateBehavior();
         TestRequest request = new("aaron", "pa$$word123");
         TestResponse response = new("ok");
-        RequestHandlerDelegate<TestResponse> next = () => Task.FromResult(response);
+        Task<TestResponse> next(CancellationToken _ = default) => Task.FromResult(response);
 
         TestResponse result = await behavior.Handle(request, next, CancellationToken.None);
 
@@ -69,7 +69,7 @@ public class UnhandledExceptionLoggingBehaviorTests
     {
         UnhandledExceptionLoggingBehavior<TestRequest, TestResponse> behavior = CreateBehavior();
         TestRequest request = new("aaron", "pa$$word123");
-        RequestHandlerDelegate<TestResponse> next = () =>
+        Task<TestResponse> next(CancellationToken _ = default) =>
             throw new InvalidOperationException("Something went wrong.");
 
         Func<Task> act = async () => await behavior.Handle(request, next, CancellationToken.None);
diff --git a/web/backend/Shared/Shared.Application.Tests/Behaviors/ValidationBehaviorTests.cs b/web/backend/Shared/Shared.Application.Tests/Behaviors/ValidationBehaviorTests.cs
index 71919190..25acf7ef 100644
--- a/web/backend/Shared/Shared.Application.Tests/Behaviors/ValidationBehaviorTests.cs
+++ b/web/backend/Shared/Shared.Application.Tests/Behaviors/ValidationBehaviorTests.cs
@@ -31,17 +31,13 @@ public class ValidationBehaviorTests
         TestRequest request = new("aaron", "pa$$word123");
         TestResponse response = new("ok");
         bool nextInvoked = false;
-        RequestHandlerDelegate<TestResponse> next = () =>
+        Task<TestResponse> next(CancellationToken _ = default)
         {
             nextInvoked = true;
             return Task.FromResult(response);
-        };
+        }
 
-        TestResponse result = await behavior.Handle(
-            request,
-            next,
-            CancellationToken.None
-        );
+        TestResponse result = await behavior.Handle(request, next, CancellationToken.None);
 
         nextInvoked.Should().BeTrue();
         result.Should().BeSameAs(response);
@@ -65,11 +61,11 @@ public class ValidationBehaviorTests
         );
         TestRequest request = new("", "pa$$word123");
         bool nextInvoked = false;
-        RequestHandlerDelegate<TestResponse> next = () =>
+        Task<TestResponse> next(CancellationToken _ = default)
         {
             nextInvoked = true;
             return Task.FromResult(new TestResponse("ok"));
-        };
+        }
 
         Func<Task> act = async () => await behavior.Handle(request, next, CancellationToken.None);
 
@@ -107,7 +103,7 @@ public class ValidationBehaviorTests
             secondValidatorMock.Object
         );
         TestRequest request = new("aaron", "pa$$word123");
-        RequestHandlerDelegate<TestResponse> next = () =>
+        static Task<TestResponse> next(CancellationToken _ = default) =>
             Task.FromResult(new TestResponse("ok"));
 
         await behavior.Handle(request, next, CancellationToken.None);
@@ -158,7 +154,7 @@ public class ValidationBehaviorTests
             secondValidatorMock.Object
         );
         TestRequest request = new("", "pa$$word123");
-        RequestHandlerDelegate<TestResponse> next = () =>
+        Task<TestResponse> next(CancellationToken _ = default) =>
             Task.FromResult(new TestResponse("ok"));
 
         Func<Task> act = async () => await behavior.Handle(request, next, CancellationToken.None);
@@ -171,17 +167,12 @@ public class ValidationBehaviorTests
     [Fact]
     public async Task Handle_WhenNoValidatorsAreRegistered_InvokesNext()
     {
-        ValidationBehavior<TestRequest, TestResponse> behavior =
-            CreateBehavior();
+        ValidationBehavior<TestRequest, TestResponse> behavior = CreateBehavior();
         TestRequest request = new("aaron", "pa$$word123");
         TestResponse response = new("ok");
-        RequestHandlerDelegate<TestResponse> next = () => Task.FromResult(response);
+        Task<TestResponse> next(CancellationToken _ = default) => Task.FromResult(response);
 
-        TestResponse result = await behavior.Handle(
-            request,
-            next,
-            CancellationToken.None
-        );
+        TestResponse result = await behavior.Handle(request, next, CancellationToken.None);
 
         result.Should().BeSameAs(response);
     }
diff --git a/web/backend/Shared/Shared.Application/Behaviors/UnhandledExceptionLoggingBehavior.cs b/web/backend/Shared/Shared.Application/Behaviors/UnhandledExceptionLoggingBehavior.cs
index 0137b683..4eec359e 100644
--- a/web/backend/Shared/Shared.Application/Behaviors/UnhandledExceptionLoggingBehavior.cs
+++ b/web/backend/Shared/Shared.Application/Behaviors/UnhandledExceptionLoggingBehavior.cs
@@ -67,7 +67,7 @@ public partial class UnhandledExceptionLoggingBehavior<TRequest, TResponse>
     {
         try
         {
-            return await next();
+            return await next(cancellationToken);
         }
         catch (ValidationException)
         {
@@ -78,7 +78,7 @@ public partial class UnhandledExceptionLoggingBehavior<TRequest, TResponse>
         {
             if (_logger.IsEnabled(LogLevel.Error))
                 LogUnhandledException(ex, typeof(TRequest).Name, Serialize(request));
-            
+
             throw;
         }
     }
diff --git a/web/backend/Shared/Shared.Application/Behaviors/ValidationBehavior.cs b/web/backend/Shared/Shared.Application/Behaviors/ValidationBehavior.cs
index 6c18690e..6f72a573 100644
--- a/web/backend/Shared/Shared.Application/Behaviors/ValidationBehavior.cs
+++ b/web/backend/Shared/Shared.Application/Behaviors/ValidationBehavior.cs
@@ -21,7 +21,7 @@ public class ValidationBehavior<TRequest, TResponse>(IEnumerable<IValidator<TReq
     )
     {
         if (!validators.Any())
-            return await next();
+            return await next(cancellationToken);
 
         ValidationContext<TRequest> context = new(request);
 
@@ -35,6 +35,6 @@ public class ValidationBehavior<TRequest, TResponse>(IEnumerable<IValidator<TReq
         if (failures.Count > 0)
             throw new ValidationException(failures);
 
-        return await next();
+        return await next(cancellationToken);
     }
 }
diff --git a/web/backend/Shared/Shared.Application/Shared.Application.csproj b/web/backend/Shared/Shared.Application/Shared.Application.csproj
index 305d1df0..f50a7b1e 100644
--- a/web/backend/Shared/Shared.Application/Shared.Application.csproj
+++ b/web/backend/Shared/Shared.Application/Shared.Application.csproj
@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="MediatR" Version="12.4.1" />
+        <PackageReference Include="MediatR" Version="12.5.0" />
         <PackageReference Include="FluentValidation" Version="11.3.0" />
         <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.1" />
     </ItemGroup>