1diff --git i/setup.py w/setup.py
2index 0176467..2b74988 100755
3--- i/setup.py
4+++ w/setup.py
5@@ -9,11 +9,11 @@ install_requires = [
6 'cerberus>=0.9.2,<0.10',
7 'events>=0.2.1,<0.3',
8 'simplejson>=3.3.0,<4.0',
9- 'werkzeug>=0.9.4,<=0.11.15',
10- 'markupsafe>=0.23,<1.0',
11- 'jinja2>=2.8,<3.0',
12- 'itsdangerous>=0.24,<1.0',
13- 'flask>=0.10.1,<=0.12',
14+ 'werkzeug>=0.9.4',
15+ 'markupsafe>=0.23',
16+ 'jinja2>=2.8',
17+ 'itsdangerous>=0.24',
18+ 'flask>=0.10.1',
19 'pymongo>=3.4',
20 'flask-pymongo>=0.4',
21 ]