diff --git a/requirements_dev.txt b/requirements_dev.txt
index 6999eda..d8b2488 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -11,7 +11,7 @@ imagesize==0.7.1
 Jinja2==2.8
 lazy-object-proxy==1.2.2
 MarkupSafe==0.23
-py==1.4.34
+py==1.10.0
 Pygments==2.1.3
 pylint==1.5.6
 pytest==3.2.1