diff --git a/service/requirements.txt b/service/requirements.txt
index 8f53e34..2948c82 100644
--- a/service/requirements.txt
+++ b/service/requirements.txt
@@ -9,7 +9,7 @@ gunicorn==19.7.1
 icalendar==4.0.0
 idna==2.6
 pluggy==0.6.0
-py==1.5.2
+py==1.10.0
 pytest==3.4.0
 python-dateutil==2.6.1
 python-mimeparse==1.6.0