diff --git a/app.py b/app.py
index 5396c2e..a9fd5d0 100644
--- a/app.py
+++ b/app.py
@@ -8,6 +8,7 @@ Created on Fri Sep  4 11:36:24 2020
 import tkinter
 import tkinter.font
 import tkinter.filedialog
+import tkinter.messagebox
 import subprocess
 import configparser
 import os