-Django==1.1
-django-piston==0.2.3rc1
-librarian==1.2.2
-lxml==2.2.2
-mercurial==1.3.1
+## Python libraries
+lxml>=2.2.2
+mercurial>=1.6,<1.7
+PyYAML>=3.0
+PIL>=1.1
+oauth2
+httplib2 # oauth2 dependency
+
+## Book conversion library
+# git+git://github.com/fnp/librarian.git@master#egg=librarian
+
+## Django
+Django>=1.3,<1.4
+sorl-thumbnail>=3.2
+django-maintenancemode>=0.9
+django-pagination
+django-gravatar
+django-celery
+django-kombu
+
+# migrations
+south>=0.6