diff --git a/requirements.txt b/requirements.txt
index b01ad15..f530250 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -98,6 +98,6 @@ tornado==5.1.1
 traitlets==4.3.2
 urllib3==1.24.1
 wcwidth==0.1.7
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 widgetsnbextension==3.4.2
 xlrd==1.1.0