diff --git a/web_application/heroku_deployment/requirements.txt b/web_application/heroku_deployment/requirements.txt
index 100463a..46ad716 100644
--- a/web_application/heroku_deployment/requirements.txt
+++ b/web_application/heroku_deployment/requirements.txt
@@ -22,6 +22,6 @@ six==1.11.0
 SQLAlchemy==1.1.15
 traitlets==4.3.2
 wcwidth==0.1.7
-Werkzeug==0.12.2
+Werkzeug==0.15.3
 gunicorn==19.7.1