diff --git a/test/PhoneNumbers.Data.Tests/PhoneNumbers.Data.Tests.csproj b/test/PhoneNumbers.Data.Tests/PhoneNumbers.Data.Tests.csproj
index d0360802..7d629da8 100644
--- a/test/PhoneNumbers.Data.Tests/PhoneNumbers.Data.Tests.csproj
+++ b/test/PhoneNumbers.Data.Tests/PhoneNumbers.Data.Tests.csproj
@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="xunit" Version="2.6.5" />
+    <PackageReference Include="xunit" Version="2.6.6" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
diff --git a/test/PhoneNumbers.Tests/PhoneNumbers.Tests.csproj b/test/PhoneNumbers.Tests/PhoneNumbers.Tests.csproj
index 670a081b..4094565f 100644
--- a/test/PhoneNumbers.Tests/PhoneNumbers.Tests.csproj
+++ b/test/PhoneNumbers.Tests/PhoneNumbers.Tests.csproj
@@ -13,7 +13,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="Moq" Version="4.20.70" />
-    <PackageReference Include="xunit" Version="2.6.5" />
+    <PackageReference Include="xunit" Version="2.6.6" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>