AttributeError: 'module' object has no attribute 'SSLContext'

raceback (most recent call last):
  File "viki_mq_service.py", line 21, in <module>
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/blocking_connection.py", line 360, in __init__
    self._impl = self._create_connection(parameters, _impl_class)
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/blocking_connection.py", line 445, in _create_connection
    ioloop.poll()
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/select_connection.py", line 576, in poll
    self._poller.poll()
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/select_connection.py", line 1200, in poll
    self._dispatch_fd_events(fd_event_map)
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/select_connection.py", line 904, in _dispatch_fd_events
    handler(fileno, events)
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/utils/selector_ioloop_adapter.py", line 391, in _on_reader_writer_fd_events
    callbacks.writer()
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/diagnostic_utils.py", line 53, in log_exception_func_wrap
    return func(*args, **kwargs)
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/utils/io_services_utils.py", line 353, in _on_writable
    self._report_completion(result)
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/diagnostic_utils.py", line 53, in log_exception_func_wrap
    return func(*args, **kwargs)
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/utils/io_services_utils.py", line 286, in _report_completion
    self._on_done(result)
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/utils/connection_workflow.py", line 400, in _on_tcp_connection_done
    on_done=self._on_transport_establishment_done)
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/utils/io_services_utils.py", line 133, in create_streaming_connection
    on_done=on_done).start()
  File "/usr/local/Python27/lib/python2.7/site-packages/pika/adapters/utils/io_services_utils.py", line 388, in __init__
    if not isinstance(ssl_context, (type(None), ssl.SSLContext)):
AttributeError: 'module' object has no attribute 'SSLContext'

pip install pika==0.11.0