diff --git a/requirements.txt b/requirements.txt
index 9f7fd06..5ddb180 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -77,7 +77,7 @@ traitlets==4.3.2
 urllib3==1.22
 wcwidth==0.1.7
 webencodings==0.5.1
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 widgetsnbextension==3.2.1
 wrapt==1.10.11
 WTForms==2.1