diff --git a/Commands/CloseCommand.cs b/Commands/CloseCommand.cs
index 3071a5f..2ce8747 100644
--- a/Commands/CloseCommand.cs
+++ b/Commands/CloseCommand.cs
@@ -202,6 +202,7 @@ public class CloseCommand
                 }
                 catch (NotFoundException) { /* ignore */ }
                 catch (UnauthorizedException) { /* ignore */ }
+                catch (NullReferenceException) { /* ignore */ }
             }
 
             Database.ArchiveTicket(ticket);