diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 07a0536..95b1884
--- a/requirements.txt
+++ b/requirements.txt
@@ -122,7 +122,7 @@ prompt-toolkit==1.0.15
 protobuf==3.5.1
 psutil==5.4.0
 ptyprocess==0.5.2
-py==1.4.34
+py==1.10.0
 pycodestyle==2.3.1
 pycosat==0.6.2
 pycparser==2.18