diff --git a/requirements.txt b/requirements.txt
index 0f1289f..1a1c18f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,9 @@
 # Add here external Python modules dependencies, one per line. Module names
 # should match https://pypi.python.org/pypi names. For the full spec or
 # dependency lines, see https://pip.readthedocs.org/en/1.1/requirements.html
-vcversioner
+patool
+python-dateutil
 python-hglib
 retrying
-python-dateutil
 sqlitedict
+vcversioner