diff --git a/requirements.txt b/requirements.txt
index 9196203..22cbe27 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
 Jinja2==2.10
-MarkupSafe==1.0
-pendulum==1.5.1
-python-dateutil==2.7.3
-pytz==2018.4
-pytzdata==2018.5
-six==1.11.0
+MarkupSafe==1.1.0
+pendulum==2.0.4
+python-dateutil==2.8.0
+pytz==2018.9
+pytzdata==2018.9
+six==1.12.0
 tzlocal==1.5.1