diff --git a/requirements.txt b/requirements.txt
index fb90a4d..7972201 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ tornado==4.5.2
 traitlets==4.3.2
 urllib3==1.22
 wcwidth==0.1.7
-Werkzeug==0.12.2
+Werkzeug==0.15.3
 widgetsnbextension==3.0.2
 win-unicode-console==0.5
 wincertstore==0.2