diff --git a/src/timingserver/requirements.txt b/src/timingserver/requirements.txt
index 2ba192d..e0111e2 100644
--- a/src/timingserver/requirements.txt
+++ b/src/timingserver/requirements.txt
@@ -6,6 +6,6 @@ MarkupSafe==0.23
 python-engineio
 python-socketio
 six==1.9.0
-Werkzeug==0.10.4
+Werkzeug==0.15.3
 gevent
 gevent-websocket