diff --git a/Demo_Desktop_Widget_Email_Notification.py b/Demo_Desktop_Widget_Email_Notification.py
index 8c371ad4..5896231a 100644
--- a/Demo_Desktop_Widget_Email_Notification.py
+++ b/Demo_Desktop_Widget_Email_Notification.py
@@ -5,6 +5,8 @@ if sys.version_info[0] >= 3:
     import PySimpleGUI as sg
 else:
     import PySimpleGUI27 as sg
+    sg.PopupError('Sorry, at the moment this program only runs on Python 3')
+    sys.exit()
 
 import email
 import imaplib