diff --git a/update.py b/update.py
index 47b700e..b896f4d 100755
--- a/update.py
+++ b/update.py
@@ -7,7 +7,6 @@ import os
 import re
 import subprocess
 from datetime import datetime, timedelta, tzinfo
-from itertools import chain
 from tempfile import mkstemp
 from zipfile import ZipFile