diff --git a/requirements.txt b/requirements.txt
index 86c6ac6..aabf981 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,4 +34,4 @@ simplegeneric==0.8.1
 six==1.10.0
 traitlets==4.1.0
 watchdog==0.8.3
-Werkzeug==0.11.3
+Werkzeug==0.15.3