diff --git a/requirements.txt b/requirements.txt
index 080dacb..0d4c4f6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -85,7 +85,7 @@ urllib3==1.22
 visitor==0.1.3
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.12.2
+Werkzeug==0.15.3
 widgetsnbextension==3.0.3
 win-inet-pton==1.0.1
 win-unicode-console==0.5