diff --git a/requirements.txt b/requirements.txt
index cc6f561..0d330ed 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,4 +43,4 @@ traitlets==4.3.2
 urllib3==1.24.1
 wcwidth==0.1.7
 websocket-client==0.54.0
-Werkzeug==0.14.1
+Werkzeug==0.15.3