Issue with tabulator module topen function

[svHatch]

Linux debian 3.16.0-4-amd64 #1 SMP Debian 3.16.39-1+deb8u2 (2017-03-07) x86_64 GNU/Linux

Installed datapaka as per the documentation, with both requirements met.

Traceback (most recent call last):
  File "/usr/local/bin/datapaka", line 28, in <module>
    dp = datapackage.DataPackage(descriptor=OrderedDict())
  File "/usr/local/lib/python2.7/dist-packages/datapackage/datapackage.py", line 57, in __init__
    self._schema = self._load_schema(schema)
  File "/usr/local/lib/python2.7/dist-packages/datapackage/datapackage.py", line 327, in _load_schema
    return datapackage.schema.Schema(schema)
  File "/usr/local/lib/python2.7/dist-packages/datapackage/schema.py", line 35, in __init__
    self._registry = self._load_registry()
  File "/usr/local/lib/python2.7/dist-packages/datapackage/schema.py", line 71, in _load_registry
    return datapackage.registry.Registry()
  File "/usr/local/lib/python2.7/dist-packages/datapackage/registry.py", line 40, in __init__
    self._registry = self._get_registry(registry_path_or_url)
  File "/usr/local/lib/python2.7/dist-packages/datapackage/registry.py", line 110, in _get_registry
    table = tabulator.topen(registry_path_or_url, headers='row1')
AttributeError: 'module' object has no attribute 'topen'

Tabulator module is at version 1.0.0, and only seems to have tabulator.io.open() available. Is there a requirement for an older version of tabulator?