diff --git a/requirements.txt b/requirements.txt
index 87440bf..01e5a06 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,6 +43,6 @@ sortedcontainers==2.1.0
 traitlets==4.3.2
 urllib3>=1.24.2
 websocket-client==0.40.0
-Werkzeug==0.15.2
+Werkzeug==0.15.3
 zope.interface==4.6.0
 colorama==0.3.9