diff --git a/requirements.txt b/requirements.txt
index d497532..5dc0706 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ Jinja2==2.9.6
 MarkupSafe==1.0
 numpy==1.13.1
 pandas==0.20.3
-py==1.4.34
+py==1.10.0
 pytest==3.2.0
 python-dateutil==2.6.1
 pytz==2017.2