diff --git a/Source/MQTTnet.AspnetCore/Client/Tcp/TcpConnection.cs b/Source/MQTTnet.AspnetCore/Client/Tcp/TcpConnection.cs
index 0dbe161..7814567 100644
--- a/Source/MQTTnet.AspnetCore/Client/Tcp/TcpConnection.cs
+++ b/Source/MQTTnet.AspnetCore/Client/Tcp/TcpConnection.cs
@@ -40,7 +40,7 @@ namespace MQTTnet.AspNetCore.Client.Tcp
             _sender = new SocketSender(_socket, PipeScheduler.ThreadPool);
             _receiver = new SocketReceiver(_socket, PipeScheduler.ThreadPool);
         }
-#if NETCOREAPP3_1
+#if NETCOREAPP3_1 || NET5_0
         public override ValueTask DisposeAsync()
 #else
         public Task DisposeAsync()
@@ -53,7 +53,7 @@ namespace MQTTnet.AspNetCore.Client.Tcp
 
             _socket?.Dispose();
 
-#if NETCOREAPP3_1
+#if NETCOREAPP3_1 || NET5_0
 
             return base.DisposeAsync();
         }
diff --git a/Source/MQTTnet.AspnetCore/Extensions/ConnectionRouteBuilderExtensions.cs b/Source/MQTTnet.AspnetCore/Extensions/ConnectionRouteBuilderExtensions.cs
index 2736fce..0595b98 100644
--- a/Source/MQTTnet.AspnetCore/Extensions/ConnectionRouteBuilderExtensions.cs
+++ b/Source/MQTTnet.AspnetCore/Extensions/ConnectionRouteBuilderExtensions.cs
@@ -12,6 +12,7 @@ namespace MQTTnet.AspNetCore.Extensions
 #if NETCOREAPP3_1
         [Obsolete("This class is obsolete and will be removed in a future version. The recommended alternative is to use MapMqtt inside Microsoft.AspNetCore.Builder.UseEndpoints(...).")]
 #endif
+#if NETCOREAPP3_1 || NETCOREAPP2_1 || NETSTANDARD
         public static void MapMqtt(this ConnectionsRouteBuilder connection, PathString path)
         {
             connection.MapConnectionHandler<MqttConnectionHandler>(path, options =>
@@ -19,5 +20,6 @@ namespace MQTTnet.AspNetCore.Extensions
                 options.WebSockets.SubProtocolSelector = MqttSubProtocolSelector.SelectSubProtocol;
             });
         }
+#endif
     }
 }
diff --git a/Source/MQTTnet.AspnetCore/Extensions/EndpointRouterExtensions.cs b/Source/MQTTnet.AspnetCore/Extensions/EndpointRouterExtensions.cs
index d2a2805..7cbed8c 100644
--- a/Source/MQTTnet.AspnetCore/Extensions/EndpointRouterExtensions.cs
+++ b/Source/MQTTnet.AspnetCore/Extensions/EndpointRouterExtensions.cs
@@ -1,5 +1,5 @@
 
-#if NETCOREAPP3_1
+#if NETCOREAPP3_1 || NET5_0
 
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Routing;
diff --git a/Source/MQTTnet.AspnetCore/MQTTnet.AspNetCore.csproj b/Source/MQTTnet.AspnetCore/MQTTnet.AspNetCore.csproj
index 3c9cd22..f2a891d 100644
--- a/Source/MQTTnet.AspnetCore/MQTTnet.AspNetCore.csproj
+++ b/Source/MQTTnet.AspnetCore/MQTTnet.AspNetCore.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp2.1;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netcoreapp2.1;netcoreapp3.1;net5.0</TargetFrameworks>
     <Product />
     <Company />
     <Authors />
@@ -21,11 +21,11 @@
     <DefineConstants>RELEASE;NETSTANDARD2_0</DefineConstants>
   </PropertyGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1' or '$(TargetFramework)' == 'net5.0' ">
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
     
-  <ItemGroup Condition="'$(TargetFramework)' != 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' != 'netcoreapp3.1' and '$(TargetFramework)' != 'net5.0' ">
     <PackageReference Include="Microsoft.AspNetCore.Http.Connections" Version="1.1.0" />
   </ItemGroup>
 
diff --git a/Source/MQTTnet.Extensions.ManagedClient/MQTTnet.Extensions.ManagedClient.csproj b/Source/MQTTnet.Extensions.ManagedClient/MQTTnet.Extensions.ManagedClient.csproj
index 016fd0e..c07aa15 100644
--- a/Source/MQTTnet.Extensions.ManagedClient/MQTTnet.Extensions.ManagedClient.csproj
+++ b/Source/MQTTnet.Extensions.ManagedClient/MQTTnet.Extensions.ManagedClient.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard1.3;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>netstandard1.3;netstandard2.0;netstandard2.1;net5.0</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net452;net461</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' AND '$(MSBuildRuntimeType)' != 'Core' AND '$(SolutionName)' != 'MQTTnet.noUWP' ">$(TargetFrameworks);uap10.0</TargetFrameworks>
     <Product />
diff --git a/Source/MQTTnet.Extensions.Rpc/MQTTnet.Extensions.Rpc.csproj b/Source/MQTTnet.Extensions.Rpc/MQTTnet.Extensions.Rpc.csproj
index 016fd0e..c07aa15 100644
--- a/Source/MQTTnet.Extensions.Rpc/MQTTnet.Extensions.Rpc.csproj
+++ b/Source/MQTTnet.Extensions.Rpc/MQTTnet.Extensions.Rpc.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard1.3;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>netstandard1.3;netstandard2.0;netstandard2.1;net5.0</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net452;net461</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' AND '$(MSBuildRuntimeType)' != 'Core' AND '$(SolutionName)' != 'MQTTnet.noUWP' ">$(TargetFrameworks);uap10.0</TargetFrameworks>
     <Product />
diff --git a/Source/MQTTnet.Extensions.WebSocket4Net/MQTTnet.Extensions.WebSocket4Net.csproj b/Source/MQTTnet.Extensions.WebSocket4Net/MQTTnet.Extensions.WebSocket4Net.csproj
index e5bb3be..bd6fbb9 100644
--- a/Source/MQTTnet.Extensions.WebSocket4Net/MQTTnet.Extensions.WebSocket4Net.csproj
+++ b/Source/MQTTnet.Extensions.WebSocket4Net/MQTTnet.Extensions.WebSocket4Net.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard1.3;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>netstandard1.3;netstandard2.0;netstandard2.1;net5.0</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net452;net461</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' AND '$(MSBuildRuntimeType)' != 'Core' AND '$(SolutionName)' != 'MQTTnet.noUWP' ">$(TargetFrameworks);uap10.0</TargetFrameworks>
     <Product />
diff --git a/Source/MQTTnet.Server/MQTTnet.Server.csproj b/Source/MQTTnet.Server/MQTTnet.Server.csproj
index 8001c80..337a063 100644
--- a/Source/MQTTnet.Server/MQTTnet.Server.csproj
+++ b/Source/MQTTnet.Server/MQTTnet.Server.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
     <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
     <AssemblyName>MQTTnet.Server</AssemblyName>
     <RootNamespace>MQTTnet.Server</RootNamespace>
@@ -41,11 +41,18 @@
   <ItemGroup>
     <PackageReference Include="IronPython" Version="2.7.11" />
     <PackageReference Include="IronPython.StdLib" Version="2.7.11" />
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.5" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.1.2" />
     <PackageReference Include="Swashbuckle.AspNetCore.SwaggerGen" Version="5.6.3" />
     <PackageReference Include="Swashbuckle.AspNetCore.SwaggerUI" Version="5.6.3" />
   </ItemGroup>
+  
+  <ItemGroup Condition="'$(TargetFramework)' != 'net5.0'">
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.5" />
+  </ItemGroup>
+  
+  <ItemGroup Condition="'$(TargetFramework)' == 'net5.0'">
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="5.0.0" />
+  </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\MQTTnet.AspnetCore\MQTTnet.AspNetCore.csproj" />
diff --git a/Source/MQTTnet/Diagnostics/TargetFrameworkProvider.cs b/Source/MQTTnet/Diagnostics/TargetFrameworkProvider.cs
index 82d133e..a5e181d 100644
--- a/Source/MQTTnet/Diagnostics/TargetFrameworkProvider.cs
+++ b/Source/MQTTnet/Diagnostics/TargetFrameworkProvider.cs
@@ -22,6 +22,8 @@
                 return "uap10.0";
 #elif NETCOREAPP3_1
                 return "netcoreapp3.1";
+#elif NET5_0
+                return "net5.0";
 #endif
             }
         }
diff --git a/Source/MQTTnet/MQTTnet.csproj b/Source/MQTTnet/MQTTnet.csproj
index 66b39fa..42989f3 100644
--- a/Source/MQTTnet/MQTTnet.csproj
+++ b/Source/MQTTnet/MQTTnet.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard1.3;netstandard2.0;netstandard2.1;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard1.3;netstandard2.0;netstandard2.1;netcoreapp3.1;net5.0</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net452;net461</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' AND '$(MSBuildRuntimeType)' != 'Core' AND '$(SolutionName)' != 'MQTTnet.noUWP' ">$(TargetFrameworks);uap10.0</TargetFrameworks>
     <AssemblyName>MQTTnet</AssemblyName>
diff --git a/Tests/MQTTnet.AspNetCore.Tests/MQTTnet.AspNetCore.Tests.csproj b/Tests/MQTTnet.AspNetCore.Tests/MQTTnet.AspNetCore.Tests.csproj
index e743b97..24efb9b 100644
--- a/Tests/MQTTnet.AspNetCore.Tests/MQTTnet.AspNetCore.Tests.csproj
+++ b/Tests/MQTTnet.AspNetCore.Tests/MQTTnet.AspNetCore.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1;net461</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;net461;net5.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
diff --git a/Tests/MQTTnet.Benchmarks/MQTTnet.Benchmarks.csproj b/Tests/MQTTnet.Benchmarks/MQTTnet.Benchmarks.csproj
index e4c8e2f..7551874 100644
--- a/Tests/MQTTnet.Benchmarks/MQTTnet.Benchmarks.csproj
+++ b/Tests/MQTTnet.Benchmarks/MQTTnet.Benchmarks.csproj
@@ -3,16 +3,23 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <DebugType>Full</DebugType>
-    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">net461;netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">net461;netcoreapp2.1;net5.0</TargetFrameworks>
     <TargetFramework Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.1</TargetFramework>
     <LangVersion>7.2</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
-    <PackageReference Include="System.IO.Pipelines" Version="4.7.2" />
     <PackageReference Include="Microsoft.AspNetCore" Version="2.2.0" />
   </ItemGroup>
+  
+  <ItemGroup Condition="'$(TargetFramework)' != 'net5.0'">
+    <PackageReference Include="System.IO.Pipelines" Version="4.7.2" />
+  </ItemGroup>
+  
+  <ItemGroup Condition="'$(TargetFramework)' == 'net5.0'">
+    <PackageReference Include="System.IO.Pipelines" Version="5.0.0" />
+  </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\..\Source\MQTTnet.AspnetCore\MQTTnet.AspNetCore.csproj" />
diff --git a/Tests/MQTTnet.Core.Tests/MQTTnet.Tests.csproj b/Tests/MQTTnet.Core.Tests/MQTTnet.Tests.csproj
index 398a8b8..63244d6 100644
--- a/Tests/MQTTnet.Core.Tests/MQTTnet.Tests.csproj
+++ b/Tests/MQTTnet.Core.Tests/MQTTnet.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1;net461</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;net461;net5.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
diff --git a/Tests/MQTTnet.TestApp.AspNetCore2/MQTTnet.TestApp.AspNetCore2.csproj b/Tests/MQTTnet.TestApp.AspNetCore2/MQTTnet.TestApp.AspNetCore2.csproj
index b060967..8b5428b 100644
--- a/Tests/MQTTnet.TestApp.AspNetCore2/MQTTnet.TestApp.AspNetCore2.csproj
+++ b/Tests/MQTTnet.TestApp.AspNetCore2/MQTTnet.TestApp.AspNetCore2.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0</TargetFrameworks>
     <TypeScriptToolsVersion>Latest</TypeScriptToolsVersion>
   </PropertyGroup>
 
diff --git a/Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs b/Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs
index 9a240f5..6eb8bfb 100644
--- a/Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs
+++ b/Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs
@@ -27,7 +27,7 @@ namespace MQTTnet.TestApp.AspNetCore2
         }
 
         // In class _Startup_ of the ASP.NET Core 3.1 project.
-#if NETCOREAPP3_1
+#if NETCOREAPP3_1 || NET5_0
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
             app.UseRouting();
diff --git a/Tests/MQTTnet.TestApp.NetCore/MQTTnet.TestApp.NetCore.csproj b/Tests/MQTTnet.TestApp.NetCore/MQTTnet.TestApp.NetCore.csproj
index 3c4c8e8..124452e 100644
--- a/Tests/MQTTnet.TestApp.NetCore/MQTTnet.TestApp.NetCore.csproj
+++ b/Tests/MQTTnet.TestApp.NetCore/MQTTnet.TestApp.NetCore.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <DebugType>Full</DebugType>
-    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net5.0</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net452;net461</TargetFrameworks>
   </PropertyGroup>