gspread: `ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)` When opening sheet

After successfully authenticating I’m getting an SSL error whenever I try to open a sheet.

scope = ['https://spreadsheets.google.com/feeds']
credentials = SignedJwtAssertionCredentials(GOOGLE_AUTH['client_email'], GOOGLE_AUTH['private_key'], scope)
gc = gspread.authorize(credentials)

sh = gc.open('Genesis-QuestionBank')

Traceback (most recent call last):
  File "genesis/bin/import_questions.py", line 27, in <module>
    sh = gc.open('Genesis-QuestionBank')
  File "/Users/administrator2/.virtualenvs/genesis/lib/python2.7/site-packages/gspread/client.py", line 134, in open
    feed = self.get_spreadsheets_feed()
  File "/Users/administrator2/.virtualenvs/genesis/lib/python2.7/site-packages/gspread/client.py", line 220, in get_spreadsheets_feed
    r = self.session.get(url)
  File "/Users/administrator2/.virtualenvs/genesis/lib/python2.7/site-packages/gspread/httpsession.py", line 79, in get
    return self.request('GET', url, **kwargs)
  File "/Users/administrator2/.virtualenvs/genesis/lib/python2.7/site-packages/gspread/httpsession.py", line 71, in request
    uri.scheme + uri.netloc].request(method, url, data, headers=request_headers)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1001, in request
    self._send_request(method, url, body, headers)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1035, in _send_request
    self.endheaders(body)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 997, in endheaders
    self._send_output(message_body)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 850, in _send_output
    self.send(msg)
File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 812, in send
    self.connect()
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1212, in connect
    server_hostname=server_hostname)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 350, in wrap_socket
    _context=self)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 566, in __init__
    self.do_handshake()
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 788, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)