diff --git a/requirements.txt b/requirements.txt
index dc92bcc..180dcc4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,5 +19,5 @@ python-dateutil==2.6.1
 pytz==2017.3
 six==1.11.0
 visitor==0.1.3
-Werkzeug==0.13
+Werkzeug==0.15.3
 WTForms==2.1