diff --git a/src/Shentun.WebPeis.Domain/DiseaseRisks/DiseaseRiskManager.cs b/src/Shentun.WebPeis.Domain/DiseaseRisks/DiseaseRiskManager.cs
index 27b8c5c..c8471b3 100644
--- a/src/Shentun.WebPeis.Domain/DiseaseRisks/DiseaseRiskManager.cs
+++ b/src/Shentun.WebPeis.Domain/DiseaseRisks/DiseaseRiskManager.cs
@@ -8,10 +8,11 @@ using System.Text;
 using System.Threading.Tasks;
 using Volo.Abp.Domain.Entities;
 using Volo.Abp.Domain.Repositories;
+using Volo.Abp.Domain.Services;
 
 namespace Shentun.WebPeis.DiseaseRisks
 {
-    public class DiseaseRiskManager
+    public class DiseaseRiskManager : DomainService
     {
 
         private readonly IRepository<DiseaseRisk> _diseaseRiskRepository;