diff --git a/requirements/heroku.txt b/requirements/heroku.txt
index 40a885c..35e11a9 100644
--- a/requirements/heroku.txt
+++ b/requirements/heroku.txt
@@ -36,7 +36,7 @@ text-unidecode==1.2
 urllib3==1.24.1
 visitor==0.1.3
 webencodings==0.5.1
-Werkzeug==0.12.2
+Werkzeug==0.15.3
 WTForms==2.1
 Flask-SSLify==0.1.5
 gunicorn==19.9.0