diff --git a/requirements.txt b/requirements.txt
index e38e55b..5dc5d87 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ itypes==1.1.0
 jsonref==0.1
 markdown2==2.3.1
 mccabe==0.5.2
-py==1.4.31
+py==1.10.0
 pycodestyle==2.0.0
 pyflakes==1.2.3
 pytest==3.0.2