diff --git a/test/NHSNumberValidator.Test/NHSNumberValidator.Test.csproj b/test/NHSNumberValidator.Test/NHSNumberValidator.Test.csproj
index 6eb72de..a990ca1 100644
--- a/test/NHSNumberValidator.Test/NHSNumberValidator.Test.csproj
+++ b/test/NHSNumberValidator.Test/NHSNumberValidator.Test.csproj
@@ -8,7 +8,7 @@
 
     <ItemGroup>
         <PackageReference Include="JUnitTestLogger" Version="1.1.0" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
         <PackageReference Include="Reqnroll.xUnit" Version="3.3.3" />
         <PackageReference Include="xunit" Version="2.9.3" />
         <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">