diff --git a/README.md b/README.md
index 75112e7..1a9a7ef 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ No documentation yet. Resort to tests at SharpModbus.Test and SharpModbus.Test.S
 
 ## Development Setup
 
-- Windows 10 Pro 64x / macOS 10.13.2
+- Windows 10 Pro 64x (Windows only)
 - VS Code (bash terminal from Git4Win)
 - Net Core SDK 3.1.201
 - dotnet CLI
@@ -50,12 +50,8 @@ dotnet test SharpModbus.Test.Special --filter FullyQualifiedName~Opto22SnapPacTe
 dotnet build SharpModbus.Test.Special
 ```
 
-## Multiplatform
-
-- 1.0.6 at nuget confirmed to work on MacOS/Ubuntu with .Net Core 2.0.2
-- 1.0.6 at nuget confirmed to work on Windows10 with NetFramework40/.Net Core 2.0.2
-
 ## TODO
 
+- [ ] Support Linux / macOS
 - [ ] Improve documentation and samples
 - [ ] Support Modbus ASCII
\ No newline at end of file
diff --git a/SharpModbus.Test.Special/SharpModbus.Test.Special.csproj b/SharpModbus.Test.Special/SharpModbus.Test.Special.csproj
index c45902d..9b80070 100644
--- a/SharpModbus.Test.Special/SharpModbus.Test.Special.csproj
+++ b/SharpModbus.Test.Special/SharpModbus.Test.Special.csproj
@@ -8,9 +8,9 @@
   <ItemGroup>
     <ProjectReference Include="..\SharpModbus\SharpModbus.csproj"/>  
     <ProjectReference Include="..\SharpModbus.Test\SharpModbus.Test.csproj"/>  
-    <PackageReference Include="NUnit" Version="3.8.1" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.8.0-*" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.*" />
+    <PackageReference Include="nunit" Version="3.12.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0"/>
   </ItemGroup>
   
 </Project>
diff --git a/SharpModbus.Test/SharpModbus.Test.csproj b/SharpModbus.Test/SharpModbus.Test.csproj
index db01449..0fee214 100644
--- a/SharpModbus.Test/SharpModbus.Test.csproj
+++ b/SharpModbus.Test/SharpModbus.Test.csproj
@@ -7,9 +7,9 @@
 
   <ItemGroup>
     <ProjectReference Include="..\SharpModbus\SharpModbus.csproj"/>  
-    <PackageReference Include="NUnit" Version="3.8.1" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.8.0-*" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.*" />
+    <PackageReference Include="nunit" Version="3.12.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0"/>
   </ItemGroup>
   
 </Project>