diff --git a/requirements.txt b/requirements.txt
index e5ba813..0cbc7c9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ six==1.11.0
 SQLAlchemy==1.1.14
 urllib3>=1.23
 visitor==0.1.3
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 WTForms==2.1
 
 # requirements for Heroku