diff --git a/test/NHSNumberGenerator.Test/NHSNumberGenerator.Test.csproj b/test/NHSNumberGenerator.Test/NHSNumberGenerator.Test.csproj
index d0c80a9..9112784 100644
--- a/test/NHSNumberGenerator.Test/NHSNumberGenerator.Test.csproj
+++ b/test/NHSNumberGenerator.Test/NHSNumberGenerator.Test.csproj
@@ -17,7 +17,7 @@
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-        <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+        <PackageReference Include="xunit.runner.visualstudio" Version="2.5.5">
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