diff --git a/clients/pythonweb/provgraph_web/requirements.txt b/clients/pythonweb/provgraph_web/requirements.txt
index 4fd4aa82..241300a2 100644
--- a/clients/pythonweb/provgraph_web/requirements.txt
+++ b/clients/pythonweb/provgraph_web/requirements.txt
@@ -11,4 +11,4 @@ MarkupSafe==0.23
 six==1.10.0
 SQLAlchemy==1.1.4
 webassets==0.12.0
-Werkzeug==0.11.11
+Werkzeug==0.15.5