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 a9a9655..15359e6 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="18.4.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.0" />
         <PackageReference Include="NUnit" Version="4.5.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />
         <PackageReference Include="coverlet.collector" Version="10.0.0" />
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 d7b0e25..a5af0b9 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="18.4.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.0" />
         <PackageReference Include="NUnit" Version="4.5.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />
         <PackageReference Include="coverlet.collector" Version="10.0.0" />
diff --git a/TomLonghurst.ReadableTimeSpan.UnitTests/TomLonghurst.ReadableTimeSpan.UnitTests.csproj b/TomLonghurst.ReadableTimeSpan.UnitTests/TomLonghurst.ReadableTimeSpan.UnitTests.csproj
index 5d4b068..6397505 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="10.0.7" />
         <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="10.0.7" />
         <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.7" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.0" />
         <PackageReference Include="NUnit" Version="4.5.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />
         <PackageReference Include="coverlet.collector" Version="10.0.0" />