diff --git a/VaughanTests/VaughanTests.fsproj b/VaughanTests/VaughanTests.fsproj
index afde22a..3a47d1b 100644
--- a/VaughanTests/VaughanTests.fsproj
+++ b/VaughanTests/VaughanTests.fsproj
@@ -24,7 +24,7 @@
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-    <PackageReference Include="xunit" Version="2.6.5" />
+    <PackageReference Include="xunit" Version="2.6.6" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6" />
     <PackageReference Include="FsCheck.Xunit" Version="2.16.6" />
     <PackageReference Include="FsUnit.xUnit" Version="6.0.0" />