diff --git a/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Extensions/TagHelperExtensions.cs b/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Extensions/TagHelperExtensions.cs
index d925fd11e8..af961a2bf6 100644
--- a/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Extensions/TagHelperExtensions.cs
+++ b/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Extensions/TagHelperExtensions.cs
@@ -2,7 +2,6 @@
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Razor.TagHelpers;
 using System.Text.Encodings.Web;
-using Volo.Abp.Threading;
 
 namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Extensions
 {