diff --git a/requirements-dev.txt b/requirements-dev.txt
old mode 100755
new mode 100644
index 66c52e4..c0a232f
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,7 +4,7 @@ pylint==1.5.5
 pytest-cov==2.3.1
 pydocstyle==1.0.0
 pytest==3.0.3
-py==1.4.31
+py==1.10.0
 pygments==2.1.3
 mock==2.0.0
 requests==2.11.1