diff --git a/requirement_dev.txt b/requirement_dev.txt
index bb4b154..e274850 100644
--- a/requirement_dev.txt
+++ b/requirement_dev.txt
@@ -10,7 +10,7 @@ Jinja2==2.10
 MarkupSafe==1.0
 more-itertools==4.2.0
 pluggy==0.6.0
-py==1.5.4
+py==1.10.0
 pytest==3.6.3
 python-chatfuel-class==2.1.3
 requests==2.19.1