diff --git a/requirements.txt b/requirements.txt
index 5ea94e2..9588b8d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ Flask>=1.0.2
 Flask-PyMongo==2.3.0
 Jinja2==2.10
 MarkupSafe==1.1.1
-Werkzeug==0.14.1
+Werkzeug==0.15.5
 itsdangerous==1.1.0
 pymongo==3.10.1
 pytz==2018.9