diff --git a/src/Http/Wolverine.Http.FluentValidation/Wolverine.Http.FluentValidation.csproj b/src/Http/Wolverine.Http.FluentValidation/Wolverine.Http.FluentValidation.csproj
index 0dfebd515..8dfec2945 100644
--- a/src/Http/Wolverine.Http.FluentValidation/Wolverine.Http.FluentValidation.csproj
+++ b/src/Http/Wolverine.Http.FluentValidation/Wolverine.Http.FluentValidation.csproj
@@ -10,6 +10,7 @@
         <GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute>
         <GenerateAssemblyInformationalVersionAttribute>false</GenerateAssemblyInformationalVersionAttribute>
         <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
     </PropertyGroup>
 
     <ItemGroup>
diff --git a/src/Http/Wolverine.Http.Marten/Wolverine.Http.Marten.csproj b/src/Http/Wolverine.Http.Marten/Wolverine.Http.Marten.csproj
index 11b5769ef..f3c47aaee 100644
--- a/src/Http/Wolverine.Http.Marten/Wolverine.Http.Marten.csproj
+++ b/src/Http/Wolverine.Http.Marten/Wolverine.Http.Marten.csproj
@@ -10,6 +10,7 @@
         <GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute>
         <GenerateAssemblyInformationalVersionAttribute>false</GenerateAssemblyInformationalVersionAttribute>
         <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
     </PropertyGroup>
 
     <ItemGroup>
diff --git a/src/Http/Wolverine.Http/HttpChain.cs b/src/Http/Wolverine.Http/HttpChain.cs
index e770cc0ad..7c5e97c8d 100644
--- a/src/Http/Wolverine.Http/HttpChain.cs
+++ b/src/Http/Wolverine.Http/HttpChain.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Reflection;
@@ -328,7 +329,7 @@ private void applyMetadata()
         return variable;
     }
 
-    public bool FindRouteVariable(ParameterInfo parameter, out Variable variable)
+    public bool FindRouteVariable(ParameterInfo parameter, [NotNullWhen(true)]out Variable? variable)
     {
         var existing = _routeVariables.FirstOrDefault(x =>
             x.VariableType == parameter.ParameterType && x.Usage.EqualsIgnoreCase(parameter.Name));
@@ -357,11 +358,11 @@ public bool FindRouteVariable(ParameterInfo parameter, out Variable variable)
             }
         }
 
-        variable = default!;
+        variable = default;
         return false;
     }
 
-    public bool FindRouteVariable(Type variableType, string routeOrParameterName, out Variable variable)
+    public bool FindRouteVariable(Type variableType, string routeOrParameterName, [NotNullWhen(true)]out Variable? variable)
     {
         var matched =
             _routeVariables.FirstOrDefault(x => x.VariableType == variableType && x.Usage == routeOrParameterName);
@@ -389,7 +390,7 @@ public bool FindRouteVariable(Type variableType, string routeOrParameterName, ou
             }
         }
 
-        variable = default!;
+        variable = default;
         return false;
 
     }
diff --git a/src/Http/Wolverine.Http/HttpGraph.cs b/src/Http/Wolverine.Http/HttpGraph.cs
index ba9c09006..2f6c7ad8d 100644
--- a/src/Http/Wolverine.Http/HttpGraph.cs
+++ b/src/Http/Wolverine.Http/HttpGraph.cs
@@ -1,3 +1,4 @@
+using System.Diagnostics.CodeAnalysis;
 using JasperFx.CodeGeneration;
 using JasperFx.CodeGeneration.Frames;
 using JasperFx.Core;
@@ -123,7 +124,7 @@ public override IChangeToken GetChangeToken()
         return this;
     }
 
-    public HttpChain? ChainFor(string httpMethod, string urlPattern)
+    public HttpChain? ChainFor(string httpMethod, [StringSyntax("Route")]string urlPattern)
     {
         return _chains.FirstOrDefault(x => x.HttpMethods.Contains(httpMethod) && x.RoutePattern!.RawText == urlPattern);
     }
diff --git a/src/Http/Wolverine.Http/IHttpAware.cs b/src/Http/Wolverine.Http/IHttpAware.cs
index b96dbc006..99144689b 100644
--- a/src/Http/Wolverine.Http/IHttpAware.cs
+++ b/src/Http/Wolverine.Http/IHttpAware.cs
@@ -1,4 +1,5 @@
-using System.Reflection;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
 using JasperFx.CodeGeneration;
 using JasperFx.CodeGeneration.Frames;
 using JasperFx.CodeGeneration.Model;
@@ -83,7 +84,7 @@ public static EndpointBuilder RemoveStatusCodeResponse(this EndpointBuilder buil
 /// Base class for resource types that denote some kind of resource being created
 /// in the system. Wolverine specific, and more efficient, version of Created<T> from ASP.Net Core
 /// </summary>
-public record CreationResponse(string Url) : IHttpAware
+public record CreationResponse([StringSyntax("Route")]string Url) : IHttpAware
 {
     public static void PopulateMetadata(MethodInfo method, EndpointBuilder builder)
     {
diff --git a/src/Http/Wolverine.Http/ModifyHttpChainAttribute.cs b/src/Http/Wolverine.Http/ModifyHttpChainAttribute.cs
index 7ccc33d36..484a91475 100644
--- a/src/Http/Wolverine.Http/ModifyHttpChainAttribute.cs
+++ b/src/Http/Wolverine.Http/ModifyHttpChainAttribute.cs
@@ -1,3 +1,4 @@
+using System.Diagnostics.CodeAnalysis;
 using System.Reflection;
 using JasperFx.CodeGeneration;
 using JasperFx.CodeGeneration.Model;
@@ -112,7 +113,7 @@ public override void Modify(HttpChain chain, GenerationRules rules)
 /// </summary>
 public class WolverineGetAttribute : WolverineHttpMethodAttribute
 {
-    public WolverineGetAttribute(string template) : base("GET", template)
+    public WolverineGetAttribute([StringSyntax("Route")]string template) : base("GET", template)
     {
     }
 
@@ -124,7 +125,7 @@ public WolverineGetAttribute(string template) : base("GET", template)
 /// </summary>
 public class WolverinePostAttribute : WolverineHttpMethodAttribute
 {
-    public WolverinePostAttribute(string template) : base("POST", template)
+    public WolverinePostAttribute([StringSyntax("Route")]string template) : base("POST", template)
     {
     }
 }
@@ -134,7 +135,7 @@ public WolverinePostAttribute(string template) : base("POST", template)
 /// </summary>
 public class WolverinePutAttribute : WolverineHttpMethodAttribute
 {
-    public WolverinePutAttribute(string template) : base("PUT", template)
+    public WolverinePutAttribute([StringSyntax("Route")]string template) : base("PUT", template)
     {
     }
 }
@@ -144,7 +145,7 @@ public WolverinePutAttribute(string template) : base("PUT", template)
 /// </summary>
 public class WolverineHeadAttribute : WolverineHttpMethodAttribute
 {
-    public WolverineHeadAttribute(string template) : base("HEAD", template)
+    public WolverineHeadAttribute([StringSyntax("Route")]string template) : base("HEAD", template)
     {
     }
 }
@@ -154,7 +155,7 @@ public WolverineHeadAttribute(string template) : base("HEAD", template)
 /// </summary>
 public class WolverineDeleteAttribute : WolverineHttpMethodAttribute
 {
-    public WolverineDeleteAttribute(string template) : base("DELETE", template)
+    public WolverineDeleteAttribute([StringSyntax("Route")]string template) : base("DELETE", template)
     {
     }
 }
@@ -164,7 +165,7 @@ public WolverineDeleteAttribute(string template) : base("DELETE", template)
 /// </summary>
 public class WolverinePatchAttribute : WolverineHttpMethodAttribute
 {
-    public WolverinePatchAttribute(string template) : base("PATCH", template)
+    public WolverinePatchAttribute([StringSyntax("Route")]string template) : base("PATCH", template)
     {
     }
 }
@@ -174,7 +175,7 @@ public WolverinePatchAttribute(string template) : base("PATCH", template)
 /// </summary>
 public class WolverineOptionsAttribute : WolverineHttpMethodAttribute
 {
-    public WolverineOptionsAttribute(string template) : base("OPTIONS", template)
+    public WolverineOptionsAttribute([StringSyntax("Route")]string template) : base("OPTIONS", template)
     {
     }
 }
diff --git a/src/Http/Wolverine.Http/WolverineHttpEndpointRouteBuilderExtensions.cs b/src/Http/Wolverine.Http/WolverineHttpEndpointRouteBuilderExtensions.cs
index 1c4146b8c..2214fdf18 100644
--- a/src/Http/Wolverine.Http/WolverineHttpEndpointRouteBuilderExtensions.cs
+++ b/src/Http/Wolverine.Http/WolverineHttpEndpointRouteBuilderExtensions.cs
@@ -1,3 +1,4 @@
+using System.Diagnostics.CodeAnalysis;
 using System.Reflection;
 using System.Text.Json;
 using Lamar;
@@ -46,7 +47,7 @@ public static void ConfigureSystemTextJsonForWolverineOrMinimalApi(this IService
     /// <param name="url"></param>
     /// <typeparam name="T"></typeparam>
     /// <returns></returns>
-    public static RouteHandlerBuilder MapPostToWolverine<T>(this IEndpointRouteBuilder endpoints, string url)
+    public static RouteHandlerBuilder MapPostToWolverine<T>(this IEndpointRouteBuilder endpoints, [StringSyntax("Route")]string url)
     {
         var runtime = GetWolverineRuntime(endpoints);
         var invoker = new Lazy<IMessageInvoker>(() => runtime.FindInvoker(typeof(T)));
@@ -62,7 +63,7 @@ public static RouteHandlerBuilder MapPostToWolverine<T>(this IEndpointRouteBuild
     /// <param name="url"></param>
     /// <typeparam name="T"></typeparam>
     /// <returns></returns>
-    public static RouteHandlerBuilder MapPutToWolverine<T>(this IEndpointRouteBuilder endpoints, string url)
+    public static RouteHandlerBuilder MapPutToWolverine<T>(this IEndpointRouteBuilder endpoints, [StringSyntax("Route")]string url)
     {
         var runtime = GetWolverineRuntime(endpoints);
         var invoker = new Lazy<IMessageInvoker>(() => runtime.FindInvoker(typeof(T)));
@@ -78,7 +79,7 @@ public static RouteHandlerBuilder MapPutToWolverine<T>(this IEndpointRouteBuilde
     /// <param name="url"></param>
     /// <typeparam name="T"></typeparam>
     /// <returns></returns>
-    public static RouteHandlerBuilder MapDeleteToWolverine<T>(this IEndpointRouteBuilder endpoints, string url)
+    public static RouteHandlerBuilder MapDeleteToWolverine<T>(this IEndpointRouteBuilder endpoints, [StringSyntax("Route")]string url)
     {
         var runtime = GetWolverineRuntime(endpoints);
         var invoker = new Lazy<IMessageInvoker>(() => runtime.FindInvoker(typeof(T)));
@@ -97,7 +98,7 @@ public static RouteHandlerBuilder MapDeleteToWolverine<T>(this IEndpointRouteBui
     /// <typeparam name="TResponse"></typeparam>
     /// <returns></returns>
     public static RouteHandlerBuilder MapPostToWolverine<TRequest, TResponse>(this IEndpointRouteBuilder endpoints,
-        string url)
+        [StringSyntax("Route")] string url)
     {
         var runtime = GetWolverineRuntime(endpoints);
         var invoker = new Lazy<IMessageInvoker>(() => runtime.FindInvoker(typeof(TRequest)));
@@ -116,7 +117,7 @@ public static RouteHandlerBuilder MapPostToWolverine<TRequest, TResponse>(this I
     /// <typeparam name="TResponse"></typeparam>
     /// <returns></returns>
     public static RouteHandlerBuilder MapPutToWolverine<TRequest, TResponse>(this IEndpointRouteBuilder endpoints,
-        string url)
+        [StringSyntax("Route")] string url)
     {
         var runtime = GetWolverineRuntime(endpoints);
         var invoker = new Lazy<IMessageInvoker>(() => runtime.FindInvoker(typeof(TRequest)));
@@ -135,7 +136,7 @@ public static RouteHandlerBuilder MapPutToWolverine<TRequest, TResponse>(this IE
     /// <typeparam name="TResponse"></typeparam>
     /// <returns></returns>
     public static RouteHandlerBuilder MapDeleteToWolverine<TRequest, TResponse>(this IEndpointRouteBuilder endpoints,
-        string url)
+        [StringSyntax("Route")] string url)
     {
         var runtime = GetWolverineRuntime(endpoints);
         var invoker = new Lazy<IMessageInvoker>(() => runtime.FindInvoker(typeof(TRequest)));
diff --git a/src/Transports/Azure/Wolverine.AzureServiceBus/Internal/AzureServiceBusEnvelope.cs b/src/Transports/Azure/Wolverine.AzureServiceBus/Internal/AzureServiceBusEnvelope.cs
index 22429df8d..81d8eaea4 100644
--- a/src/Transports/Azure/Wolverine.AzureServiceBus/Internal/AzureServiceBusEnvelope.cs
+++ b/src/Transports/Azure/Wolverine.AzureServiceBus/Internal/AzureServiceBusEnvelope.cs
@@ -46,7 +46,8 @@ public Task DeadLetterAsync(CancellationToken token, string? deadLetterReason =
     private ServiceBusReceivedMessage AzureMessage { get; }
     private ServiceBusSessionReceiver? SessionReceiver { get; }
     private ServiceBusReceiver? ServiceBusReceiver { get; }
-    public Exception Exception { get; set; }
+    
+    public Exception? Exception { get; set; }
     public bool IsCompleted { get; set; }
     public ServiceBusReceiver? Receiver { get; set; }
 }
\ No newline at end of file
diff --git a/src/Transports/Pulsar/Wolverine.Pulsar/PulsarListener.cs b/src/Transports/Pulsar/Wolverine.Pulsar/PulsarListener.cs
index 62ef97d1b..eaf98c4a1 100644
--- a/src/Transports/Pulsar/Wolverine.Pulsar/PulsarListener.cs
+++ b/src/Transports/Pulsar/Wolverine.Pulsar/PulsarListener.cs
@@ -79,7 +79,7 @@ public async ValueTask DeferAsync(Envelope envelope)
 
     public async ValueTask DisposeAsync()
     {
-        _localCancellation.Cancel();
+        await _localCancellation.CancelAsync();
 
         if (_consumer != null)
         {
diff --git a/src/Transports/RabbitMQ/Wolverine.RabbitMQ/Internal/RabbitMqTransport.Resource.cs b/src/Transports/RabbitMQ/Wolverine.RabbitMQ/Internal/RabbitMqTransport.Resource.cs
index 387499a0f..0fc22ec74 100644
--- a/src/Transports/RabbitMQ/Wolverine.RabbitMQ/Internal/RabbitMqTransport.Resource.cs
+++ b/src/Transports/RabbitMQ/Wolverine.RabbitMQ/Internal/RabbitMqTransport.Resource.cs
@@ -16,7 +16,7 @@ public bool IsEnabled(LogLevel logLevel)
         return true;
     }
 
-    public IDisposable BeginScope<TState>(TState state)
+    public IDisposable BeginScope<TState>(TState state) where TState: notnull
     {
         return new Disposable();
     }