diff --git a/requirements.txt b/requirements.txt
index 6f83d9e..3be0578 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,4 +46,4 @@ traitlets==4.3.2
 urllib3==1.23
 virtualenv==16.0.0
 wcwidth==0.1.7
-Werkzeug==0.14.1
+Werkzeug==0.15.3