diff --git a/requirements-dev.txt b/requirements-dev.txt
index e0d651f..c7a3e7c 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,7 +10,7 @@ MarkupSafe==0.23
 mccabe==0.2.1
 mock==1.0.1
 pep8==1.4.6
-py==1.4.19
+py==1.10.0
 pyflakes==0.7.3
 pylint==0.28.0
 pyntch==20091028