diff --git a/requirements.txt b/requirements.txt
index b774789..47da6d2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -69,5 +69,5 @@ traitlets==4.3.2
 urllib3==1.24.1
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 widgetsnbextension==3.4.2