diff --git a/requirements.txt b/requirements.txt
index 8681eb9..e465fc0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -74,4 +74,4 @@ traitlets==4.3.2
 urllib3==1.24.2
 wcwidth==0.1.7
 websocket-client==0.56.0
-Werkzeug==0.15.2
+Werkzeug==0.15.3