diff --git a/benchmarks/flask/requirements.txt b/benchmarks/flask/requirements.txt
index 6d63bf3..163b8bf 100644
--- a/benchmarks/flask/requirements.txt
+++ b/benchmarks/flask/requirements.txt
@@ -1,6 +1,6 @@
 Flask==0.10.1
 Jinja2==2.7.3
 MarkupSafe==0.23
-Werkzeug==0.9.6
+Werkzeug==0.15.5
 gunicorn==19.2.1
 itsdangerous==0.24