diff --git a/code/server/Server/Program.cs b/code/server/Server/Program.cs
index ccd8ca2..e53bd7c 100644
--- a/code/server/Server/Program.cs
+++ b/code/server/Server/Program.cs
@@ -4,6 +4,7 @@ using System.Net;
 using System.Net.Sockets;
 using System.Text;
 using System.Threading;
+using DataBase.Entity;
 
 class Program
 {
diff --git a/code/server/Server/Server.csproj b/code/server/Server/Server.csproj
index 40c60dd..7fa6b30 100644
--- a/code/server/Server/Server.csproj
+++ b/code/server/Server/Server.csproj
@@ -7,4 +7,8 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\DataBase\DataBase.csproj" />
+  </ItemGroup>
+
 </Project>