diff --git a/requirements-dev.txt b/requirements-dev.txt
index 2162af7..beca25a 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -7,7 +7,7 @@ imagesize==0.7.1
 Jinja2==2.8
 MarkupSafe==0.23
 pluggy==0.3.1
-py==1.4.31
+py==1.10.0
 Pygments==2.1.3
 pytz==2016.4
 requests==2.10.0