diff --git a/dev_requirements.txt b/dev_requirements.txt
index cd25220..41fa04f 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -9,7 +9,7 @@ idna==2.6
 more-itertools==4.2.0
 pluggy==0.6.0
 psutil==5.4.5
-py==1.5.3
+py==1.10.0
 pytest==3.6.0
 requests==2.18.4
 six==1.11.0