diff --git a/requirements.txt b/requirements.txt
index a3bc25c7..f4d2dd01 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,6 +44,6 @@ sphinx-rtd-theme==0.1.6
 SQLAlchemy==1.0.9
 translate-toolkit==1.13.0
 WebOb==1.3.1
-Werkzeug==0.11.3
+Werkzeug==0.15.3
 wheel==0.24.0
 WTForms==2.0.1