diff --git a/src/backend/YourSolution.AdmServer.Domain/ProjectUsings.cs b/src/backend/YourSolution.AdmServer.Domain/ProjectUsings.cs
index 196b3220..e9090a9d 100644
--- a/src/backend/YourSolution.AdmServer.Domain/ProjectUsings.cs
+++ b/src/backend/YourSolution.AdmServer.Domain/ProjectUsings.cs
@@ -1 +1,2 @@
-global using CsvIgnore = CsvHelper.Configuration.Attributes.IgnoreAttribute;
\ No newline at end of file
+global using CsvIgnore = CsvHelper.Configuration.Attributes.IgnoreAttribute;
+global using SqlIndex = FreeSql.DataAnnotations.IndexAttribute;
\ No newline at end of file