diff --git a/requirements_py27_dev.txt b/requirements_py27_dev.txt
index 1a293f4..fac691d 100644
--- a/requirements_py27_dev.txt
+++ b/requirements_py27_dev.txt
@@ -60,7 +60,7 @@ pluggy==0.4.0
 port-for==0.3.1
 prompt-toolkit==1.0.9
 ptyprocess==0.5.1
-py==1.4.32
+py==1.10.0
 pycodestyle==2.2.0
 pydot==1.2.3
 pydot2==1.0.33
diff --git a/requirements_py3_dev.txt b/requirements_py3_dev.txt
index d1c99f0..eb65f37 100644
--- a/requirements_py3_dev.txt
+++ b/requirements_py3_dev.txt
@@ -57,7 +57,7 @@ pluggy==0.4.0
 port-for==0.3.1
 prompt-toolkit==1.0.9
 ptyprocess==0.5.1
-py==1.4.32
+py==1.10.0
 pycodestyle==2.2.0
 pydot==1.2.3
 pydot2==1.0.33