diff --git a/requirements.txt b/requirements.txt
index ea4722a..b5a25d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,4 @@ pbr>=1.6  # Apache-2.0
 icalendar
 Jinja2>=2.8  # BSD License (3 clause)
 PyYAML>=3.1.0  # MIT
-extras>=1.0.0  # MIT
 pytz