diff --git i/setup.py w/setup.py
index 0176467..2b74988 100755
--- i/setup.py
+++ w/setup.py
@@ -9,11 +9,11 @@ install_requires = [
     'cerberus>=0.9.2,<0.10',
     'events>=0.2.1,<0.3',
     'simplejson>=3.3.0,<4.0',
-    'werkzeug>=0.9.4,<=0.11.15',
-    'markupsafe>=0.23,<1.0',
-    'jinja2>=2.8,<3.0',
-    'itsdangerous>=0.24,<1.0',
-    'flask>=0.10.1,<=0.12',
+    'werkzeug>=0.9.4',
+    'markupsafe>=0.23',
+    'jinja2>=2.8',
+    'itsdangerous>=0.24',
+    'flask>=0.10.1',
     'pymongo>=3.4',
     'flask-pymongo>=0.4',
 ]