diff --git a/appveyor.yml b/appveyor.yml
index 17d8c78..e387c74 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,5 @@
 version: '{build}'
-image: Visual Studio 2019
+image: Visual Studio 2022
 configuration: Release
 
 before_build:
diff --git a/global.json b/global.json
index 80d84a2..f3cb0dc 100644
--- a/global.json
+++ b/global.json
@@ -1,5 +1,5 @@
 {
   "msbuild-sdks": {
-    "MSBuild.Sdk.Extras": "2.0.54"
+    "MSBuild.Sdk.Extras": "3.0.44"
   }
 }
\ No newline at end of file
diff --git a/samples/FluentAssertions.AspNetCore.Mvc.Sample.Tests/FluentAssertions.AspNetCore.Mvc.Sample.Tests.csproj b/samples/FluentAssertions.AspNetCore.Mvc.Sample.Tests/FluentAssertions.AspNetCore.Mvc.Sample.Tests.csproj
index 5779acc..e62cd9e 100644
--- a/samples/FluentAssertions.AspNetCore.Mvc.Sample.Tests/FluentAssertions.AspNetCore.Mvc.Sample.Tests.csproj
+++ b/samples/FluentAssertions.AspNetCore.Mvc.Sample.Tests/FluentAssertions.AspNetCore.Mvc.Sample.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;netcoreapp3.0;net6.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>
diff --git a/samples/FluentAssertions.AspNetCore.Mvc.Sample/FluentAssertions.AspNetCore.Mvc.Sample.csproj b/samples/FluentAssertions.AspNetCore.Mvc.Sample/FluentAssertions.AspNetCore.Mvc.Sample.csproj
index 05343b2..b028c67 100644
--- a/samples/FluentAssertions.AspNetCore.Mvc.Sample/FluentAssertions.AspNetCore.Mvc.Sample.csproj
+++ b/samples/FluentAssertions.AspNetCore.Mvc.Sample/FluentAssertions.AspNetCore.Mvc.Sample.csproj
@@ -1,11 +1,11 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;netcoreapp3.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp2.1'">
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.1.4" />
+    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.1.34" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.0'">
diff --git a/samples/FluentAssertions.AspNetCore.Mvc.Sample/Startup.cs b/samples/FluentAssertions.AspNetCore.Mvc.Sample/Startup.cs
index 4f7d319..16b17b0 100644
--- a/samples/FluentAssertions.AspNetCore.Mvc.Sample/Startup.cs
+++ b/samples/FluentAssertions.AspNetCore.Mvc.Sample/Startup.cs
@@ -3,12 +3,21 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
+#if NETCOREAPP3_0_OR_GREATER
+using Microsoft.Extensions.Hosting;
+#endif
 
 namespace FluentAssertions.AspNetCore.Mvc.Sample
 {
     public class Startup
     {
-        public Startup(IHostingEnvironment env)
+        public Startup(
+#if NETCOREAPP3_0_OR_GREATER
+            IWebHostEnvironment env
+#else
+            IHostingEnvironment env
+#endif
+            )
         {
             var builder = new ConfigurationBuilder()
                 .SetBasePath(env.ContentRootPath)
@@ -39,7 +48,13 @@ public void ConfigureServices(IServiceCollection services)
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
+        public void Configure(IApplicationBuilder app,
+#if NETCOREAPP3_0_OR_GREATER
+            IWebHostEnvironment env,
+#else
+            IHostingEnvironment env,
+#endif
+            ILoggerFactory loggerFactory)
         {
             if (env.IsDevelopment())
             {
diff --git a/src/FluentAssertions.AspNetCore.Mvc.Ref/FluentAssertions.AspNetCore.Mvc.Ref.csproj b/src/FluentAssertions.AspNetCore.Mvc.Ref/FluentAssertions.AspNetCore.Mvc.Ref.csproj
index 586a918..3fdaf52 100644
--- a/src/FluentAssertions.AspNetCore.Mvc.Ref/FluentAssertions.AspNetCore.Mvc.Ref.csproj
+++ b/src/FluentAssertions.AspNetCore.Mvc.Ref/FluentAssertions.AspNetCore.Mvc.Ref.csproj
@@ -1,18 +1,21 @@
 <Project Sdk="MSBuild.Sdk.Extras">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netcoreapp3.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
-  <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.0.0" />
-  </ItemGroup>
+	<ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
+		<PackageReference Include="FluentAssertions" Version="6.6.0" />
+		<FrameworkReference Include="Microsoft.AspNetCore.App" />
+	</ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
+		<PackageReference Include="FluentAssertions" Version="6.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.1.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.0'">
+		<PackageReference Include="FluentAssertions" Version="6.0.0" />
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
 
diff --git a/src/FluentAssertions.AspNetCore.Mvc/FluentAssertions.AspNetCore.Mvc.csproj b/src/FluentAssertions.AspNetCore.Mvc/FluentAssertions.AspNetCore.Mvc.csproj
index 1a5b037..23c8dbd 100644
--- a/src/FluentAssertions.AspNetCore.Mvc/FluentAssertions.AspNetCore.Mvc.csproj
+++ b/src/FluentAssertions.AspNetCore.Mvc/FluentAssertions.AspNetCore.Mvc.csproj
@@ -5,9 +5,9 @@
     <Copyright>Copyright 2018</Copyright>
     <AssemblyTitle>Fluent Assertions extensions for ASP.NET Core MVC</AssemblyTitle>
     <Title>Fluent Assertions for ASP.NET Core MVC</Title>
-    <VersionPrefix>4.2.0</VersionPrefix>
+    <VersionPrefix>4.3.0</VersionPrefix>
     <Authors>Casey Burns;Kevin Kuszyk</Authors>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netcoreapp3.0;net6.0</TargetFrameworks>
     <AssemblyName>FluentAssertions.AspNetCore.Mvc</AssemblyName>
     <PackageId>FluentAssertions.AspNetCore.Mvc</PackageId>
     <PackageTags>TDD;Fluent;Mvc;AspNetMvc;aspnetcore;aspnetcoremvc</PackageTags>
@@ -23,15 +23,18 @@
     <OutputPath>bin\$(Configuration)\$(TargetFramework)\</OutputPath>
   </PropertyGroup>
 
-  <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.0.0" />
-  </ItemGroup>
+	<ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
+		<PackageReference Include="FluentAssertions" Version="6.6.0" />
+    <FrameworkReference Include="Microsoft.AspNetCore.App" />
+	</ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
+		<PackageReference Include="FluentAssertions" Version="6.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.1.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.0'">
+		<PackageReference Include="FluentAssertions" Version="6.0.0" />
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
 
diff --git a/src/FluentAssertions.AspNetCore.Mvc/JsonResultAssertions.cs b/src/FluentAssertions.AspNetCore.Mvc/JsonResultAssertions.cs
index 95b83e1..5a0a226 100644
--- a/src/FluentAssertions.AspNetCore.Mvc/JsonResultAssertions.cs
+++ b/src/FluentAssertions.AspNetCore.Mvc/JsonResultAssertions.cs
@@ -30,7 +30,7 @@ public JsonResultAssertions(JsonResult subject) : base(subject)
         /// <summary>
         /// The <see cref="JsonResult.SerializerSettings"/> on the tested subject.
         /// </summary>
-#if NETCOREAPP3_0
+#if NETCOREAPP3_0_OR_GREATER
         public object SerializerSettings => JsonResultSubject.SerializerSettings;
 #else
         public Newtonsoft.Json.JsonSerializerSettings SerializerSettings => JsonResultSubject.SerializerSettings;
diff --git a/tests/FluentAssertions.AspNetCore.Mvc.Tests/ConvertToActionResultAssertions_Tests.cs b/tests/FluentAssertions.AspNetCore.Mvc.Tests/ConvertToActionResultAssertions_Tests.cs
index c1d55cd..e7031ea 100644
--- a/tests/FluentAssertions.AspNetCore.Mvc.Tests/ConvertToActionResultAssertions_Tests.cs
+++ b/tests/FluentAssertions.AspNetCore.Mvc.Tests/ConvertToActionResultAssertions_Tests.cs
@@ -29,7 +29,7 @@ public void BeActionResult_GivenActionResultOfTValue_ShouldReturnActionResultAss
 
             var result = subject.Should().BeActionResult<object>();
 
-            result.Should().BeOfType<ActionResultAssertions<object>>();
+            Assert.IsType<ActionResultAssertions<object>>(result);
         }
 
         [Fact]
diff --git a/tests/FluentAssertions.AspNetCore.Mvc.Tests/FluentAssertions.AspNetCore.Mvc.Tests.csproj b/tests/FluentAssertions.AspNetCore.Mvc.Tests/FluentAssertions.AspNetCore.Mvc.Tests.csproj
index b79c1c7..8ae0cd9 100644
--- a/tests/FluentAssertions.AspNetCore.Mvc.Tests/FluentAssertions.AspNetCore.Mvc.Tests.csproj
+++ b/tests/FluentAssertions.AspNetCore.Mvc.Tests/FluentAssertions.AspNetCore.Mvc.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;netcoreapp3.0;net6.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>