diff --git a/requirements.txt b/requirements.txt
index b2656bb..66f5bb5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -82,5 +82,5 @@ traitlets==4.3.2
 unityagents==0.4.0
 urllib3==1.24.1
 wcwidth==0.1.7
-Werkzeug==0.14.1
+Werkzeug==0.15.3
 widgetsnbextension==3.4.2