diff --git a/setup.py b/setup.py
index e959ec9f..7788b5a1 100644
--- a/setup.py
+++ b/setup.py
@@ -55,7 +55,7 @@ install_requires = [
     'py-bcrypt',
     'pytest>=2.3.1',
     'pytest-xdist',
-    'werkzeug>=0.7',
+    'werkzeug>=0.7,<1.0.0',
     'celery>=3.0',
     'jinja2',
     'Babel>=1.3',