diff --git a/trytond/setup.py b/trytond/setup.py
index 637f6e041b..364ae567fa 100755
--- a/trytond/setup.py
+++ b/trytond/setup.py
@@ -141,7 +141,7 @@ setup(name=name,
         'python-dateutil',
         'polib',
         'python-sql >= 0.5',
-        'werkzeug',
+        'werkzeug >= 0.12',
         'wrapt',
         'passlib >= 1.7.0',
         ],