diff --git a/requirements-dev.txt b/requirements-dev.txt
index 61f007c..bce6ad2 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,7 +4,7 @@ pycodestyle==2.3.1
 pyflakes==2.0.0
 
 # Deps do pytest
-py==1.5.3
+py==1.9.0
 atomicwrites==1.0
 more-itertools==4.0.0
 six==1.10.0