diff --git a/framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/ValueConverters/AbpJsonValueConverter.cs b/framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/ValueConverters/AbpJsonValueConverter.cs
index 31a1418022..e77b2842a8 100644
--- a/framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/ValueConverters/AbpJsonValueConverter.cs
+++ b/framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/ValueConverters/AbpJsonValueConverter.cs
@@ -1,5 +1,4 @@
-using System.Collections.Generic;
-using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 using Newtonsoft.Json;
 
 namespace Volo.Abp.EntityFrameworkCore.ValueConverters