diff --git a/requirements.txt b/requirements.txt
index 2cadd0e..5580283 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -84,5 +84,5 @@ traitlets==4.3.2
 urllib3==1.22
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.12.2
+Werkzeug==0.15.3
 widgetsnbextension==3.0.6