diff --git a/Demos/FeedDemo/FeedDemo.csproj b/Demos/FeedDemo/FeedDemo.csproj
index c9f7094..691f166 100644
--- a/Demos/FeedDemo/FeedDemo.csproj
+++ b/Demos/FeedDemo/FeedDemo.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
diff --git a/Demos/QueryResponseDemo/QueryResponseDemo.csproj b/Demos/QueryResponseDemo/QueryResponseDemo.csproj
index c1388b1..158e112 100644
--- a/Demos/QueryResponseDemo/QueryResponseDemo.csproj
+++ b/Demos/QueryResponseDemo/QueryResponseDemo.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
diff --git a/Demos/SerializationDemo/SerializationDemo.csproj b/Demos/SerializationDemo/SerializationDemo.csproj
index c1388b1..158e112 100644
--- a/Demos/SerializationDemo/SerializationDemo.csproj
+++ b/Demos/SerializationDemo/SerializationDemo.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
diff --git a/Demos/SubscriberDemo/SubscriberDemo.csproj b/Demos/SubscriberDemo/SubscriberDemo.csproj
index c1388b1..158e112 100644
--- a/Demos/SubscriberDemo/SubscriberDemo.csproj
+++ b/Demos/SubscriberDemo/SubscriberDemo.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
diff --git a/kx.Benchmark.Test/kx.Benchmark.Test.csproj b/kx.Benchmark.Test/kx.Benchmark.Test.csproj
index 8a8c45d..d7ae79c 100644
--- a/kx.Benchmark.Test/kx.Benchmark.Test.csproj
+++ b/kx.Benchmark.Test/kx.Benchmark.Test.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net8</TargetFramework>
     <StartupObject>kx.Benchmark.Test.Program</StartupObject>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>kx.Benchmark.Test.snk</AssemblyOriginatorKeyFile>
diff --git a/kx.Test/TestUtils/TestSerialisationHelper.cs b/kx.Test/TestUtils/TestSerialisationHelper.cs
index 0d3f039..b8708ed 100644
--- a/kx.Test/TestUtils/TestSerialisationHelper.cs
+++ b/kx.Test/TestUtils/TestSerialisationHelper.cs
@@ -1,42 +1,42 @@
-using System;
+using MessagePack;
+using System;
 using System.IO;
 using System.Runtime.Serialization.Formatters.Binary;
+using System.Text.Json;
 
 namespace kx.Test.TestUtils
 {
+  /// <summary>
+  /// A helper class for testing serialisation and de-serialisation logic 
+  /// in unit-tests
+  /// </summary>
+  internal static class TestSerialisationHelper
+  {
     /// <summary>
-    /// A helper class for testing serialisation and de-serialisation logic 
-    /// in unit-tests
+    /// Performs binary serialisation and de-serialisation on a specified exception.
     /// </summary>
-    internal static class TestSerialisationHelper
+    /// <typeparam name="T">The type of exception being tested.</typeparam>
+    /// <param name="exception">The exception to be serialised and de-serialised.</param>
+    /// <returns>
+    /// A de-serialised instance of the exception passed. All serialisable members should match the original.
+    /// </returns>
+    /// <remarks>
+    /// This is primarily intended to confirm custom exceptions within the DeltaApiCore 
+    /// library comply to ISerialization pattern.
+    /// 
+    /// See https://stackoverflow.com/questions/94488/what-is-the-correct-way-to-make-a-custom-net-exception-serializable
+    /// </remarks>
+    public static T SerialiseAndDeserialiseException<T>(T exception)
+        where T : Exception
     {
-        /// <summary>
-        /// Performs binary serialisation and de-serialisation on a specified exception.
-        /// </summary>
-        /// <typeparam name="T">The type of exception being tested.</typeparam>
-        /// <param name="exception">The exception to be serialised and de-serialised.</param>
-        /// <returns>
-        /// A de-serialised instance of the exception passed. All serialisable members should match the original.
-        /// </returns>
-        /// <remarks>
-        /// This is primarily intended to confirm custom exceptions within the DeltaApiCore 
-        /// library comply to ISerialization pattern.
-        /// 
-        /// See https://stackoverflow.com/questions/94488/what-is-the-correct-way-to-make-a-custom-net-exception-serializable
-        /// </remarks>
-        public static T SerialiseAndDeserialiseException<T>(T exception)
-            where T : Exception
-        {
-            BinaryFormatter binaryFormatter = new BinaryFormatter();
+      using (var stream = new MemoryStream())
+      {
+        MessagePackSerializer.Serialize(stream, exception, MessagePack.Resolvers.ContractlessStandardResolver.Options);
 
-            using (var stream = new MemoryStream())
-            {
-                binaryFormatter.Serialize(stream, exception);
+        stream.Seek(0, 0);
 
-                stream.Seek(0, 0);
-
-                return (T)binaryFormatter.Deserialize(stream);
-            }
-        }
+        return (T)MessagePackSerializer.Deserialize<T>(stream, MessagePack.Resolvers.ContractlessStandardResolver.Options);
+      }
     }
+  }
 }
diff --git a/kx.Test/kx.Test.csproj b/kx.Test/kx.Test.csproj
index b42f6ab..bb0f0ad 100644
--- a/kx.Test/kx.Test.csproj
+++ b/kx.Test/kx.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net8</TargetFramework>
 
     <IsPackable>false</IsPackable>
 
@@ -25,6 +25,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="MessagePack" Version="3.1.3" />
     <PackageReference Include="Moq" Version="4.15.2" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
diff --git a/kx/kx.csproj b/kx/kx.csproj
index 97ed3ab..e39bf11 100644
--- a/kx/kx.csproj
+++ b/kx/kx.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <Title>CSharpKDB</Title>
     <PackageId>CSharpKDB</PackageId>
     <Description>Provides functionality for .NET applications to interface with a KDB+ process.</Description>