diff --git a/binding/csharp/IP2Region.Net.BenchMark/IP2Region.Net.BenchMark.csproj b/binding/csharp/IP2Region.Net.BenchMark/IP2Region.Net.BenchMark.csproj
index 9a77e8c..7acf40f 100644
--- a/binding/csharp/IP2Region.Net.BenchMark/IP2Region.Net.BenchMark.csproj
+++ b/binding/csharp/IP2Region.Net.BenchMark/IP2Region.Net.BenchMark.csproj
@@ -17,7 +17,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <Content Include="..\..\..\data\ip2region.xdb">
+      <Content Include="..\..\..\data\ip2region_v4.xdb">
         <Link>IP2Region/ip2region.xdb</Link>
         <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       </Content>