diff --git a/requirements.txt b/requirements.txt
index af48d6b..9f4bb34 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -339,7 +339,7 @@ WeasyPrint==0.22
 web.py==0.37
 webapp2==2.5.2
 WebOb==1.2.3
-Werkzeug==0.8.3
+Werkzeug==0.15.3
 wheel==0.26.0
 wheezy.caching==0.1.112
 wheezy.core==0.1.136