diff --git a/Borepin/Borepin/PageModel/UserListPageModel.cs b/Borepin/Borepin/PageModel/UserListPageModel.cs
index 98bc238..220d479 100644
--- a/Borepin/Borepin/PageModel/UserListPageModel.cs
+++ b/Borepin/Borepin/PageModel/UserListPageModel.cs
@@ -12,6 +12,7 @@ using NaturalSort.Extension;
 using System.Linq;
 using Borepin.Service;
 using Xamarin.Forms;
+using System.Globalization;
 
 namespace Borepin.PageModel
 {
@@ -122,7 +123,7 @@ namespace Borepin.PageModel
         public void SearchUserCommandExecute()
         {
             List<UserListItemViewModel> users = new List<UserListItemViewModel>(UserListItemViewModel_List);
-            FilteredUserListItemViewModel_List = users.FindAll(x => x.User.Username.Contains(SearchUsername));
+            FilteredUserListItemViewModel_List = users.FindAll(x => x.User.Username.ToLower(CultureInfo.InvariantCulture).Contains(SearchUsername.ToLower(CultureInfo.InvariantCulture)));
         }
         #endregion
     }