diff --git a/requirements.txt b/requirements.txt
index 593e791..ee7f1ea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -92,5 +92,5 @@ 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