diff --git a/Bloxstrap/UI/Elements/Editor/BootstrapperEditorWindow.xaml.cs b/Bloxstrap/UI/Elements/Editor/BootstrapperEditorWindow.xaml.cs
index 38a2b93..459041c 100644
--- a/Bloxstrap/UI/Elements/Editor/BootstrapperEditorWindow.xaml.cs
+++ b/Bloxstrap/UI/Elements/Editor/BootstrapperEditorWindow.xaml.cs
@@ -143,6 +143,9 @@ namespace Bloxstrap.UI.Elements.Editor
                 case ">":
                     CloseCompletionWindow();
                     break;
+                case "!":
+                    CloseCompletionWindow();
+                    break;
             }
         }