diff --git a/flask/requirements.txt b/flask/requirements.txt
index 1db5ebe..728701f 100644
--- a/flask/requirements.txt
+++ b/flask/requirements.txt
@@ -2,7 +2,7 @@ Flask==1.0.0
 Flask-Cors==3.0.9
 Jinja2==2.11.3
 MarkupSafe==0.23
-Werkzeug==0.15.3
+Werkzeug==0.15.5
 itsdangerous==0.24
 pymongo==2.7.2
 requests==2.20.0