diff --git a/utility.py b/utility.py
index 41b7894..353646a 100644
--- a/utility.py
+++ b/utility.py
@@ -2,6 +2,7 @@ from functools import wraps
 from tempfile import mkdtemp
 from shutil import rmtree
 from subprocess import check_output, CalledProcessError
+from sys import exit
 
 
 VERBOSE = True