diff --git a/TomLonghurst.ReadableTimeSpan.Newtonsoft.Json.UnitTests/TomLonghurst.ReadableTimeSpan.Newtonsoft.Json.UnitTests.csproj b/TomLonghurst.ReadableTimeSpan.Newtonsoft.Json.UnitTests/TomLonghurst.ReadableTimeSpan.Newtonsoft.Json.UnitTests.csproj
index 1976abd..1cc8684 100644
--- a/TomLonghurst.ReadableTimeSpan.Newtonsoft.Json.UnitTests/TomLonghurst.ReadableTimeSpan.Newtonsoft.Json.UnitTests.csproj
+++ b/TomLonghurst.ReadableTimeSpan.Newtonsoft.Json.UnitTests/TomLonghurst.ReadableTimeSpan.Newtonsoft.Json.UnitTests.csproj
@@ -8,7 +8,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
         <PackageReference Include="NUnit" Version="4.5.0" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
         <PackageReference Include="coverlet.collector" Version="8.0.0" />
diff --git a/TomLonghurst.ReadableTimeSpan.System.Text.Json.UnitTests/TomLonghurst.ReadableTimeSpan.System.Text.Json.UnitTests.csproj b/TomLonghurst.ReadableTimeSpan.System.Text.Json.UnitTests/TomLonghurst.ReadableTimeSpan.System.Text.Json.UnitTests.csproj
index 0316c5b..c14fc35 100644
--- a/TomLonghurst.ReadableTimeSpan.System.Text.Json.UnitTests/TomLonghurst.ReadableTimeSpan.System.Text.Json.UnitTests.csproj
+++ b/TomLonghurst.ReadableTimeSpan.System.Text.Json.UnitTests/TomLonghurst.ReadableTimeSpan.System.Text.Json.UnitTests.csproj
@@ -8,7 +8,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
         <PackageReference Include="NUnit" Version="4.5.0" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
         <PackageReference Include="coverlet.collector" Version="8.0.0" />
diff --git a/TomLonghurst.ReadableTimeSpan.UnitTests/TomLonghurst.ReadableTimeSpan.UnitTests.csproj b/TomLonghurst.ReadableTimeSpan.UnitTests/TomLonghurst.ReadableTimeSpan.UnitTests.csproj
index 8fc20fc..6010665 100644
--- a/TomLonghurst.ReadableTimeSpan.UnitTests/TomLonghurst.ReadableTimeSpan.UnitTests.csproj
+++ b/TomLonghurst.ReadableTimeSpan.UnitTests/TomLonghurst.ReadableTimeSpan.UnitTests.csproj
@@ -11,7 +11,7 @@
         <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.3" />
         <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="10.0.3" />
         <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.3" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
         <PackageReference Include="NUnit" Version="4.5.0" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
         <PackageReference Include="coverlet.collector" Version="8.0.0" />