diff --git a/requirements.txt b/requirements.txt
index 45e3305..0b126a3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -71,6 +71,6 @@ traitlets==4.3.2
 virtualenv==16.4.3
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 widgetsnbextension==3.5.1
 wrapt==1.11.2