diff --git a/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/CreateExcelBenchmark.cs b/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/CreateExcelBenchmark.cs
index 4bc5fe09..90a2c3cb 100644
--- a/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/CreateExcelBenchmark.cs
+++ b/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/CreateExcelBenchmark.cs
@@ -7,7 +7,6 @@
 using MiniExcelLib.Benchmarks.Utils;
 using MiniExcelLib.OpenXml;
 using MiniExcelLib.OpenXml.FluentMapping;
-using MiniExcelLib.OpenXml.FluentMapping.Api;
 using NPOI.XSSF.UserModel;
 using OfficeOpenXml;
 
diff --git a/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/QueryExcelBenchmark.cs b/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/QueryExcelBenchmark.cs
index 00ada916..ef8dd9c1 100644
--- a/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/QueryExcelBenchmark.cs
+++ b/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/QueryExcelBenchmark.cs
@@ -6,7 +6,6 @@
 using ExcelDataReader;
 using MiniExcelLib.OpenXml;
 using MiniExcelLib.OpenXml.FluentMapping;
-using MiniExcelLib.OpenXml.FluentMapping.Api;
 using NPOI.XSSF.UserModel;
 using OfficeOpenXml;
 
diff --git a/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/TemplateExcelBenchmark.cs b/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/TemplateExcelBenchmark.cs
index dc084f2f..190642c0 100644
--- a/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/TemplateExcelBenchmark.cs
+++ b/benchmarks/MiniExcel.Benchmarks/BenchmarkSections/TemplateExcelBenchmark.cs
@@ -3,7 +3,6 @@
 using MiniExcelLib.Benchmarks.Utils;
 using MiniExcelLib.OpenXml;
 using MiniExcelLib.OpenXml.FluentMapping;
-using MiniExcelLib.OpenXml.FluentMapping.Api;
 
 namespace MiniExcelLib.Benchmarks.BenchmarkSections;
 
diff --git a/benchmarks/MiniExcel.Benchmarks/MiniExcel.Benchmarks.csproj b/benchmarks/MiniExcel.Benchmarks/MiniExcel.Benchmarks.csproj
index 48d76133..9e0c9597 100644
--- a/benchmarks/MiniExcel.Benchmarks/MiniExcel.Benchmarks.csproj
+++ b/benchmarks/MiniExcel.Benchmarks/MiniExcel.Benchmarks.csproj
@@ -33,6 +33,7 @@
 
 	<ItemGroup>
 	  <ProjectReference Include="..\..\src\MiniExcel\MiniExcel.csproj" />
+	  <ProjectReference Include="..\..\src\MiniExcel.OpenXml.FluentMapping\MiniExcel.OpenXml.FluentMapping.csproj" />
 	</ItemGroup>
 
 </Project>
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
index 1e8ae4cd..01e285cc 100644
--- a/src/Directory.Build.props
+++ b/src/Directory.Build.props
@@ -2,7 +2,7 @@
     
     <PropertyGroup>
         <TargetFrameworks>netstandard2.0;net8.0;net9.0;net10.0;net11.0</TargetFrameworks>
-        <Version>2.0.0-preview.4</Version>
+        <Version>2.0.0-preview.5</Version>
         <Nullable>enable</Nullable>
         <ImplicitUsings>enable</ImplicitUsings>
         <LangVersion>preview</LangVersion>
diff --git a/src/MiniExcel.Core/MiniExcel.cs b/src/MiniExcel.Core/MiniExcel.cs
deleted file mode 100644
index e69de29b..00000000
diff --git a/src/MiniExcel.OpenXml.FluentMapping/Api/ProviderExtensions.cs b/src/MiniExcel.OpenXml.FluentMapping/Api/ProviderExtensions.cs
index a93ad015..2e930b73 100644
--- a/src/MiniExcel.OpenXml.FluentMapping/Api/ProviderExtensions.cs
+++ b/src/MiniExcel.OpenXml.FluentMapping/Api/ProviderExtensions.cs
@@ -1,4 +1,5 @@
-namespace MiniExcelLib.OpenXml.FluentMapping.Api;
+// ReSharper disable once CheckNamespace
+namespace MiniExcelLib.OpenXml.FluentMapping;
 
 public static class ProviderExtensions
 {
diff --git a/src/MiniExcel/MiniExcel.csproj b/src/MiniExcel/MiniExcel.csproj
index 5768ec5e..cee79d8b 100644
--- a/src/MiniExcel/MiniExcel.csproj
+++ b/src/MiniExcel/MiniExcel.csproj
@@ -13,7 +13,6 @@
       <ProjectReference Include="..\MiniExcel.Core\MiniExcel.Core.csproj" />
       <ProjectReference Include="..\MiniExcel.Csv\MiniExcel.Csv.csproj" />
       <ProjectReference Include="..\MiniExcel.OpenXml\MiniExcel.OpenXml.csproj" />
-      <ProjectReference Include="..\MiniExcel.OpenXml.FluentMapping\MiniExcel.OpenXml.FluentMapping.csproj" />
     </ItemGroup>
 
 </Project>
diff --git a/tests/MiniExcel.OpenXml.Tests/FluentMapping/MiniExcelMappingTemplateTests.cs b/tests/MiniExcel.OpenXml.Tests/FluentMapping/MiniExcelMappingTemplateTests.cs
index 8f49a2c4..e019308a 100644
--- a/tests/MiniExcel.OpenXml.Tests/FluentMapping/MiniExcelMappingTemplateTests.cs
+++ b/tests/MiniExcel.OpenXml.Tests/FluentMapping/MiniExcelMappingTemplateTests.cs
@@ -1,5 +1,4 @@
 using MiniExcelLib.OpenXml.FluentMapping;
-using MiniExcelLib.OpenXml.FluentMapping.Api;
 using MiniExcelLib.Tests.Common.Utils;
 
 namespace MiniExcelLib.OpenXml.Tests.FluentMapping;
diff --git a/tests/MiniExcel.OpenXml.Tests/FluentMapping/MiniExcelMappingTests.cs b/tests/MiniExcel.OpenXml.Tests/FluentMapping/MiniExcelMappingTests.cs
index 513d556a..2e820ac6 100644
--- a/tests/MiniExcel.OpenXml.Tests/FluentMapping/MiniExcelMappingTests.cs
+++ b/tests/MiniExcel.OpenXml.Tests/FluentMapping/MiniExcelMappingTests.cs
@@ -1,6 +1,5 @@
 using System.Reflection;
 using MiniExcelLib.OpenXml.FluentMapping;
-using MiniExcelLib.OpenXml.FluentMapping.Api;
 
 namespace MiniExcelLib.OpenXml.Tests.FluentMapping
 {