diff --git a/DDD.Core/DDD.Core.csproj b/DDD.Core/DDD.Core.csproj
index effc46e..2ceff5d 100644
--- a/DDD.Core/DDD.Core.csproj
+++ b/DDD.Core/DDD.Core.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/DDD.Functions.Extensions/DDD.Functions.Extensions.csproj b/DDD.Functions.Extensions/DDD.Functions.Extensions.csproj
index dbf6a0f..14560be 100644
--- a/DDD.Functions.Extensions/DDD.Functions.Extensions.csproj
+++ b/DDD.Functions.Extensions/DDD.Functions.Extensions.csproj
@@ -1,11 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="3.0.3" />
+    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.1.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/DDD.Functions/DDD.Functions.csproj b/DDD.Functions/DDD.Functions.csproj
index 7f2800a..1ec7a62 100644
--- a/DDD.Functions/DDD.Functions.csproj
+++ b/DDD.Functions/DDD.Functions.csproj
@@ -1,11 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
-    <AzureFunctionsVersion>v3</AzureFunctionsVersion>
+    <TargetFramework>net6.0</TargetFramework>
+    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
   </PropertyGroup>
   <ItemGroup>    
-    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="3.0.3" />
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.2" />
+    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.1.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="6.0.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\DDD.Functions.Extensions\DDD.Functions.Extensions.csproj" />
diff --git a/DDD.Functions/SubmitVote.cs b/DDD.Functions/SubmitVote.cs
index bcd6aab..026bc91 100644
--- a/DDD.Functions/SubmitVote.cs
+++ b/DDD.Functions/SubmitVote.cs
@@ -17,6 +17,7 @@ namespace DDD.Functions
     public static class SubmitVote
     {
         [FunctionName("SubmitVote")]
+        [Obsolete]
         public static async Task<IActionResult> Run(
             [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)]
             HttpRequestMessage req,
@@ -152,6 +153,7 @@ public class VoteRequest
 
     public static class RequestExtensions
     {
+        [Obsolete]
         public static string GetIpAddress(this HttpRequestMessage req)
         {
             if (req.Properties.ContainsKey("HttpContext"))
diff --git a/DDD.Functions/host.json b/DDD.Functions/host.json
index 81e35b7..4112a23 100644
--- a/DDD.Functions/host.json
+++ b/DDD.Functions/host.json
@@ -1,3 +1,3 @@
 {
-  "version": "2.0"
+  "version": "4.0"
 }
\ No newline at end of file
diff --git a/DDD.Sessionize.Tests/DDD.Sessionize.Tests.csproj b/DDD.Sessionize.Tests/DDD.Sessionize.Tests.csproj
index aadc480..892a5eb 100644
--- a/DDD.Sessionize.Tests/DDD.Sessionize.Tests.csproj
+++ b/DDD.Sessionize.Tests/DDD.Sessionize.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
     <RuntimeFrameworkVersion>3.1.1</RuntimeFrameworkVersion>
   </PropertyGroup>
 
diff --git a/DDD.Sessionize.Tests/TestHelpers/Shouldly/Shouldly.Core.csproj b/DDD.Sessionize.Tests/TestHelpers/Shouldly/Shouldly.Core.csproj
index e7d5168..45ec533 100644
--- a/DDD.Sessionize.Tests/TestHelpers/Shouldly/Shouldly.Core.csproj
+++ b/DDD.Sessionize.Tests/TestHelpers/Shouldly/Shouldly.Core.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Shouldly" Version="3.0.0" />
diff --git a/DDD.Sessionize/DDD.Sessionize.csproj b/DDD.Sessionize/DDD.Sessionize.csproj
index e0a4cf7..52e84ca 100644
--- a/DDD.Sessionize/DDD.Sessionize.csproj
+++ b/DDD.Sessionize/DDD.Sessionize.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/README.md b/README.md
index d46149e..3643761 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ This project contains backend functionality to run the DDD conferences, includin
 ### Prerequisites
 
 * VSCode (<https://code.visualstudio.com/>) or your preferred IDE
-* Dotnet Core 3.1 (<https://dotnet.microsoft.com/en-us/download/dotnet/3.1>)
+* Dotnet 6 (<https://dotnet.microsoft.com/en-us/download/dotnet/6>)
 * Azure Functions Core Tools(<https://docs.microsoft.com/en-us/azure/azure-functions/functions-run-local>)
 
 ### Commands