diff --git a/Entity/Statistics/UserStatistics.cs b/Entity/Statistics/UserStatistics.cs
index 306ef60..5933572 100644
--- a/Entity/Statistics/UserStatistics.cs
+++ b/Entity/Statistics/UserStatistics.cs
@@ -1,4 +1,5 @@
-using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
 
 namespace Milimoe.FunGame.Core.Entity
 {