diff --git a/DataCenter_Windows/WindowsDataCenter/SQLiteRepository/CardUniqueId.cs b/DataCenter_Windows/WindowsDataCenter/SQLiteRepository/CardUniqueId.cs
index 00dd7fd..67c3694 100644
--- a/DataCenter_Windows/WindowsDataCenter/SQLiteRepository/CardUniqueId.cs
+++ b/DataCenter_Windows/WindowsDataCenter/SQLiteRepository/CardUniqueId.cs
@@ -1,3 +1,4 @@
+using System;
 using SQLite.Net.Attributes;
 
 namespace SQLiteRepository
@@ -8,5 +9,6 @@ namespace SQLiteRepository
         public int Id { get; set; }
         public int UserId_FK { get; set; }
         public string CardUId { get; set; }
+        public DateTimeOffset LastUsed { get; set; }
     }
 }
\ No newline at end of file