diff --git a/requirements.txt b/requirements.txt
index ef7df61..f05299f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,5 +21,5 @@ python-env==1.0.0
 pytz==2016.4
 raven[flask]
 typing
-Werkzeug==0.11.9
+Werkzeug==0.15.3
 WTForms==2.1