diff --git a/src/l0/Flow.Domain.Common.UnitTests/Flow.Domain.Common.UnitTests.csproj b/src/l0/Flow.Domain.Common.UnitTests/Flow.Domain.Common.UnitTests.csproj
index 1ab20de..f2b0ac9 100644
--- a/src/l0/Flow.Domain.Common.UnitTests/Flow.Domain.Common.UnitTests.csproj
+++ b/src/l0/Flow.Domain.Common.UnitTests/Flow.Domain.Common.UnitTests.csproj
@@ -1,29 +1,29 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <Nullable>enable</Nullable>
-
-    <IsPackable>false</IsPackable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="xunit" Version="2.6.1" />
-    <PackageReference Include="xunit.categories" Version="2.0.8" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="6.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\Flow.Domain.Common\Flow.Domain.Common.csproj" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageReference Include="xunit" Version="2.6.6" />
+    <PackageReference Include="xunit.categories" Version="2.0.8" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Flow.Domain.Common\Flow.Domain.Common.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/l0/Flow.Domain.ExchangeRates.UnitTests/Flow.Domain.ExchangeRates.UnitTests.csproj b/src/l0/Flow.Domain.ExchangeRates.UnitTests/Flow.Domain.ExchangeRates.UnitTests.csproj
index d33bdb7..892e7d8 100644
--- a/src/l0/Flow.Domain.ExchangeRates.UnitTests/Flow.Domain.ExchangeRates.UnitTests.csproj
+++ b/src/l0/Flow.Domain.ExchangeRates.UnitTests/Flow.Domain.ExchangeRates.UnitTests.csproj
@@ -1,29 +1,29 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <Nullable>enable</Nullable>
-
-    <IsPackable>false</IsPackable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="xunit" Version="2.6.1" />
-    <PackageReference Include="xunit.categories" Version="2.0.8" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="6.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\Flow.Domain.ExchangeRates\Flow.Domain.ExchangeRates.csproj" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageReference Include="xunit" Version="2.6.6" />
+    <PackageReference Include="xunit.categories" Version="2.0.8" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Flow.Domain.ExchangeRates\Flow.Domain.ExchangeRates.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/l0/Flow.Domain.Patterns.UnitTests/Flow.Domain.Patterns.UnitTests.csproj b/src/l0/Flow.Domain.Patterns.UnitTests/Flow.Domain.Patterns.UnitTests.csproj
index 72ac508..a17409e 100644
--- a/src/l0/Flow.Domain.Patterns.UnitTests/Flow.Domain.Patterns.UnitTests.csproj
+++ b/src/l0/Flow.Domain.Patterns.UnitTests/Flow.Domain.Patterns.UnitTests.csproj
@@ -1,28 +1,28 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-	  <Nullable>enable</Nullable>
-	  <LangVersion>preview</LangVersion>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="xunit" Version="2.6.1" />
-    <PackageReference Include="xunit.categories" Version="2.0.8" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="6.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\Flow.Domain.Patterns\Flow.Domain.Patterns.csproj" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+	  <Nullable>enable</Nullable>
+	  <LangVersion>preview</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageReference Include="xunit" Version="2.6.6" />
+    <PackageReference Include="xunit.categories" Version="2.0.8" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Flow.Domain.Patterns\Flow.Domain.Patterns.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/l0/Flow.Domain.Transactions.UnitTests/Flow.Domain.Transactions.UnitTests.csproj b/src/l0/Flow.Domain.Transactions.UnitTests/Flow.Domain.Transactions.UnitTests.csproj
index 5c1e387..6413072 100644
--- a/src/l0/Flow.Domain.Transactions.UnitTests/Flow.Domain.Transactions.UnitTests.csproj
+++ b/src/l0/Flow.Domain.Transactions.UnitTests/Flow.Domain.Transactions.UnitTests.csproj
@@ -1,27 +1,27 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <Nullable>enable</Nullable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="xunit" Version="2.6.1" />
-    <PackageReference Include="xunit.categories" Version="2.0.8" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="6.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\Flow.Domain.Transactions\Flow.Domain.Transactions.csproj" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageReference Include="xunit" Version="2.6.6" />
+    <PackageReference Include="xunit.categories" Version="2.0.8" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Flow.Domain.Transactions\Flow.Domain.Transactions.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/l1/Flow.Application.Analysis.UnitTests/Flow.Application.Analysis.UnitTests.csproj b/src/l1/Flow.Application.Analysis.UnitTests/Flow.Application.Analysis.UnitTests.csproj
index f34ca8f..da074b5 100644
--- a/src/l1/Flow.Application.Analysis.UnitTests/Flow.Application.Analysis.UnitTests.csproj
+++ b/src/l1/Flow.Application.Analysis.UnitTests/Flow.Application.Analysis.UnitTests.csproj
@@ -1,30 +1,30 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="Moq" Version="4.20.70" />
-    <PackageReference Include="System.Linq.Async" Version="6.0.1" />
-    <PackageReference Include="xunit" Version="2.6.1" />
-    <PackageReference Include="xunit.categories" Version="2.0.8" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="6.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\Flow.Application.Analysis\Flow.Application.Analysis.csproj" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageReference Include="Moq" Version="4.20.70" />
+    <PackageReference Include="System.Linq.Async" Version="6.0.1" />
+    <PackageReference Include="xunit" Version="2.6.6" />
+    <PackageReference Include="xunit.categories" Version="2.0.8" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Flow.Application.Analysis\Flow.Application.Analysis.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/l1/Flow.Application.ExchangeRates.UnitTests/Flow.Application.ExchangeRates.UnitTests.csproj b/src/l1/Flow.Application.ExchangeRates.UnitTests/Flow.Application.ExchangeRates.UnitTests.csproj
index 4fbfbaa..91491a8 100644
--- a/src/l1/Flow.Application.ExchangeRates.UnitTests/Flow.Application.ExchangeRates.UnitTests.csproj
+++ b/src/l1/Flow.Application.ExchangeRates.UnitTests/Flow.Application.ExchangeRates.UnitTests.csproj
@@ -1,30 +1,30 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <Nullable>enable</Nullable>
-
-    <IsPackable>false</IsPackable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="Moq" Version="4.20.70" />
-    <PackageReference Include="xunit" Version="2.6.1" />
-    <PackageReference Include="xunit.categories" Version="2.0.8" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="6.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\Flow.Application.ExchangeRates\Flow.Application.ExchangeRates.csproj" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageReference Include="Moq" Version="4.20.70" />
+    <PackageReference Include="xunit" Version="2.6.6" />
+    <PackageReference Include="xunit.categories" Version="2.0.8" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Flow.Application.ExchangeRates\Flow.Application.ExchangeRates.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/l1/Flow.Application.Transactions.UnitTests/Flow.Application.Transactions.UnitTests.csproj b/src/l1/Flow.Application.Transactions.UnitTests/Flow.Application.Transactions.UnitTests.csproj
index c921d46..6646a94 100644
--- a/src/l1/Flow.Application.Transactions.UnitTests/Flow.Application.Transactions.UnitTests.csproj
+++ b/src/l1/Flow.Application.Transactions.UnitTests/Flow.Application.Transactions.UnitTests.csproj
@@ -1,31 +1,31 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <Nullable>enable</Nullable>
-
-    <IsPackable>false</IsPackable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.12.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="Moq" Version="4.20.70" />
-    <PackageReference Include="System.Linq.Async" Version="6.0.1" />
-    <PackageReference Include="xunit" Version="2.6.1" />
-    <PackageReference Include="xunit.categories" Version="2.0.8" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="6.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\Flow.Application.Transactions\Flow.Application.Transactions.csproj" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="6.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
+    <PackageReference Include="Moq" Version="4.20.70" />
+    <PackageReference Include="System.Linq.Async" Version="6.0.1" />
+    <PackageReference Include="xunit" Version="2.6.6" />
+    <PackageReference Include="xunit.categories" Version="2.0.8" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Flow.Application.Transactions\Flow.Application.Transactions.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/l2/Flow.Infrastructure.Configuration.UnitTests/Flow.Infrastructure.Configuration.UnitTests.csproj b/src/l2/Flow.Infrastructure.Configuration.UnitTests/Flow.Infrastructure.Configuration.UnitTests.csproj
index ada13e3..4aa35f5 100644
--- a/src/l2/Flow.Infrastructure.Configuration.UnitTests/Flow.Infrastructure.Configuration.UnitTests.csproj
+++ b/src/l2/Flow.Infrastructure.Configuration.UnitTests/Flow.Infrastructure.Configuration.UnitTests.csproj
@@ -12,7 +12,7 @@
     <ItemGroup>
         <PackageReference Include="FluentAssertions" Version="6.12.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-        <PackageReference Include="xunit" Version="2.6.1" />
+        <PackageReference Include="xunit" Version="2.6.6" />
         <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>