diff --git a/framework/src/Volo.Abp.AspNetCore.SignalR/Volo/Abp/AspNetCore/SignalR/AbpHub.cs b/framework/src/Volo.Abp.AspNetCore.SignalR/Volo/Abp/AspNetCore/SignalR/AbpHub.cs
index 616cbd3706..797f34d975 100644
--- a/framework/src/Volo.Abp.AspNetCore.SignalR/Volo/Abp/AspNetCore/SignalR/AbpHub.cs
+++ b/framework/src/Volo.Abp.AspNetCore.SignalR/Volo/Abp/AspNetCore/SignalR/AbpHub.cs
@@ -1,7 +1,6 @@
 using System;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.SignalR;
-using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Localization;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Abstractions;