diff --git a/CIfParserTest/CifParserTest.csproj b/CIfParserTest/CifParserTest.csproj
index d0f4b78..6999ae6 100644
--- a/CIfParserTest/CifParserTest.csproj
+++ b/CIfParserTest/CifParserTest.csproj
@@ -15,7 +15,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="NSubstitute" Version="5.1.0" />
     <PackageReference Include="Serilog" Version="3.1.0" />
-    <PackageReference Include="xunit" Version="2.6.1" />
+    <PackageReference Include="xunit" Version="2.6.6" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>