diff --git a/API_METHODS.md b/API_METHODS.md
index 9ee463c..5ee8702 100644
--- a/API_METHODS.md
+++ b/API_METHODS.md
@@ -1,5 +1,5 @@
 # MEETUP API Methods
-[Source](http://www.meetup.com/meetup_api/docs/)
+[Source](https://www.meetup.com/meetup_api/docs/)
 
 ##v3 abuse
 
diff --git a/README.rst b/README.rst
index 04c2ea0..de319b7 100644
--- a/README.rst
+++ b/README.rst
@@ -27,7 +27,7 @@ Initialize Client and Execute API Call
 .. code-block:: python
 
     >>> import meetup.api
-    >>> client = meetup.api.Client('my_special_api_key_value')
+    >>> client = meetup.api.Client('my_special_token_value')
     >>> 
     >>> type(client)
     <class 'meetup.api.Client'>
@@ -49,7 +49,7 @@ Initialize Client and Execute API Call
     'Meetup API Testing Sandbox'
     >>> 
     >>> group_info.link
-    'http://www.meetup.com/Meetup-API-Testing/'
+    'https://www.meetup.com/Meetup-API-Testing/'
 
 For a full listing of implemented API methods, take a look at the `API Client Details`_.
 
@@ -78,11 +78,11 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 
-.. _Meetup: http://www.meetup.com/
-.. _Meetup REST API documentation: http://www.meetup.com/meetup_api/
+.. _Meetup: https://www.meetup.com/
+.. _Meetup REST API documentation: https://www.meetup.com/meetup_api/
 .. _Python: https://www.python.org/
-.. _API Client Details: http://meetup-api.readthedocs.org/en/latest/meetup_api.html#api-client-details
-.. _Getting Started: http://meetup-api.readthedocs.org/en/latest/getting_started.html
+.. _API Client Details: https://meetup-api.readthedocs.org/en/latest/meetup_api.html#api-client-details
+.. _Getting Started: https://meetup-api.readthedocs.org/en/latest/getting_started.html
 
 .. |build-status| image:: https://img.shields.io/travis/pferate/meetup-api.svg?style=flat
     :alt: Build Status
diff --git a/docs/getting_started.rst b/docs/getting_started.rst
index 271ac9c..d295643 100644
--- a/docs/getting_started.rst
+++ b/docs/getting_started.rst
@@ -23,9 +23,9 @@ Usage
 Initialize Client
 ~~~~~~~~~~~~~~~~~
 
-To initialize your Meetup API Client, you will need to import the Client class and create a Client object. Before making and API requests, you will need to assign your API key to the object.
+To initialize your Meetup API Client, you will need to import the Client class and create a Client object. Before making and API requests, you will need to assign your OAuth token value to the object.
 
-Three ways to assign your API key (in order of precedence):
+Three ways to assign your OAuth token (in order of precedence):
 
 1. Assign to attribute:
 
@@ -33,20 +33,20 @@ Three ways to assign your API key (in order of precedence):
 
     >>> import meetup.api
     >>> client = meetup.api.Client()
-    >>> client.api_key = 'my_special_api_key_value'
+    >>> client.token = 'my_special_token_value'
 
 2. Assign at initialization:
 
 .. code-block:: python
 
     >>> import meetup.api
-    >>> client = meetup.api.Client('my_special_api_key_value')
+    >>> client = meetup.api.Client('my_special_token_value')
 
 3. Retrieved from environment variable:
 
 .. code-block:: bash
 
-    $ export MEETUP_API_KEY=my_special_api_key_value
+    $ export MEETUP_OAUTH_TOKEN=my_special_token_value
 
 .. code-block:: python
 
@@ -59,7 +59,7 @@ Execute API Calls
 .. code-block:: python
 
     >>> import meetup.api
-    >>> client = meetup.api.Client('my_special_api_key_value')  
+    >>> client = meetup.api.Client('my_special_token_value')  
     >>> group_info = client.GetGroup({'urlname': 'Meetup-API-Testing'})
     >>> 
     >>> type(client)
@@ -80,7 +80,7 @@ Execute API Calls
     'Meetup API Testing Sandbox'
     >>> 
     >>> group_info.link
-    'http://www.meetup.com/Meetup-API-Testing/'
+    'https://www.meetup.com/Meetup-API-Testing/'
 
 A full listing of implemented API methods can be found at
 :ref:`meetup_api`.
diff --git a/docs/index.rst b/docs/index.rst
index 043e767..d3715e0 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1,12 +1,12 @@
 Welcome to Meetup API's documentation!
 ======================================
 
-.. _Meetup: http://www.meetup.com/
-.. _API: http://www.meetup.com/meetup_api/
+.. _Meetup: https://www.meetup.com/
+.. _API: https://www.meetup.com/meetup_api/
 
 .. Inline linking was needed here due to the apostrophe.
 
-meetup-api is a Python client for `Meetup's <http://www.meetup.com/>`_ RESTful `API`_.  It is compatible with both Python 2 and Python 3.  Currently only API Key authentication is available (OAuth is planned for a future release).
+meetup-api is a Python client for `Meetup's <https://www.meetup.com/>`_ RESTful `API`_.  It is compatible with both Python 2 and Python 3.  Currently only OAuth token authentication is available, as Meetup is removing API Keys support on 15 August 2019.  The Python Requests-OAuthlib can be used to get OAuth tokens for this.
 
 .. _user-docs:
 
diff --git a/docs/meetup_api.rst b/docs/meetup_api.rst
index 7891814..b39a65c 100644
--- a/docs/meetup_api.rst
+++ b/docs/meetup_api.rst
@@ -1158,9 +1158,9 @@ API Client Methods
     
     This method does not require authentication. It requires only a url parameter and responds according to the [OEmbed specification](http://www.oembed.com/). Any of the following base URLs may refer to embeddable content:
     
-    * http://www.meetup.com/
-    * http://meetup.com/
-    * http://meetu.ps/
+    * https://www.meetup.com/
+    * https://meetup.com/
+    * https://meetu.ps/
     
     An optional __maxwidth__ parameter may be provided.
     
diff --git a/meetup/api.py b/meetup/api.py
index 65d7fe9..270bc4a 100644
--- a/meetup/api.py
+++ b/meetup/api.py
@@ -9,8 +9,8 @@
 from meetup import exceptions
 
 
-API_DEFAULT_URL = 'http://api.meetup.com/'
-API_KEY_ENV_NAME = 'MEETUP_API_KEY'
+API_DEFAULT_URL = 'https://api.meetup.com/'
+TOKEN_ENV_NAME = 'MEETUP_OAUTH_TOKEN'
 API_SPEC_DIR = os.path.join(os.path.dirname(__file__), 'api_specification')
 API_SERVICE_FILES = [
     ('v1', os.path.join(API_SPEC_DIR, 'meetup_v1_services.json')),
@@ -100,20 +100,20 @@ class Client(object):
     """
     Meetup API Client.
 
-    There are 3 options for defining the API key prior to making API calls:
+    There are 3 options for defining the oauth token prior to making API calls:
 
-    1. Pass it as a parameter (api_key)
-    2. Stored as an environment variable, if parameter is not defined. (Default: MEETUP_API_KEY)
-    3. Define it after the object is created. (client.api_key = 'my_secret_api_key')
+    1. Pass it as a parameter (api_token)
+    2. Stored as an environment variable, if parameter is not defined. (Default: MEETUP_OAUTH_TOKEN)
+    3. Define it after the object is created. (client.api_token = 'my_secret_oauth_token')
 
-    :param api_key:         Meetup API Key, from https://secure.meetup.com/meetup_api/key/
+    :param api_token:         Meetup oauth token, from https://www.meetup.com/meetup_api/auth/
     :param api_url:         Meetup API URL,  Keeping it flexible so that it can be generalized in the future.
     :param overlimit_wait:  Whether or not to wait and retry if over API request limit. (Default: True)
     """
 
-    def __init__(self, api_key=None, api_url=API_DEFAULT_URL, overlimit_wait=True):
+    def __init__(self, token=None, api_url=API_DEFAULT_URL, overlimit_wait=True):
         self._api_url = api_url
-        self.api_key = api_key or os.environ.get(API_KEY_ENV_NAME)
+        self.token = token or os.environ.get(TOKEN_ENV_NAME)
         self.overlimit_wait = overlimit_wait
         self.session = requests.Session()
         self.rate_limit = RateLimit()
@@ -131,13 +131,13 @@ def __init__(self, api_key=None, api_url=API_DEFAULT_URL, overlimit_wait=True):
                 self.services[service_name] = service_details
 
     def _call(self, service_name, parameters=None, **kwargs):
-        if not self.api_key:
-            raise exceptions.ApiKeyError('Meetup API key not set')
+        if not self.token:
+            raise exceptions.TokenError('Meetup oauth2 token not set')
         if not parameters:
             parameters = {}
         if not isinstance(parameters, dict):
             raise exceptions.ApiParameterError('Parameters must be dict')
-        parameters['key'] = self.api_key
+        parameters['access_token'] = self.token
         for key, value in six.iteritems(kwargs):
             parameters[key] = value
 
diff --git a/meetup/api_specification/meetup_v1_services.json b/meetup/api_specification/meetup_v1_services.json
index 92a81b2..7a171e0 100644
--- a/meetup/api_specification/meetup_v1_services.json
+++ b/meetup/api_specification/meetup_v1_services.json
@@ -166,7 +166,7 @@
             },
             "summary": "oEmbed implementation",
             "uri": "/oembed",
-            "notes": "\nThis method does not require authentication. It requires only a url parameter and responds according to the [OEmbed specification](http://www.oembed.com/). Any of the following base URLs may refer to embeddable content:\n\n* http://www.meetup.com/\n* http://meetup.com/\n* http://meetu.ps/\n\nAn optional __maxwidth__ parameter may be provided.\n"
+            "notes": "\nThis method does not require authentication. It requires only a url parameter and responds according to the [OEmbed specification](http://www.oembed.com/). Any of the following base URLs may refer to embeddable content:\n\n* https://www.meetup.com/\n* https://meetup.com/\n* https://meetu.ps/\n\nAn optional __maxwidth__ parameter may be provided.\n"
         },
         "GetTopics": {
             "version": "1",
@@ -257,4 +257,4 @@
             "notes": null
         }
     }
-}
\ No newline at end of file
+}
diff --git a/meetup/exceptions.py b/meetup/exceptions.py
index d084aa5..9dc59f3 100644
--- a/meetup/exceptions.py
+++ b/meetup/exceptions.py
@@ -10,9 +10,9 @@ class ClientException(MeetupBaseException):
     """
 
 
-class ApiKeyError(ClientException):
+class TokenError(ClientException):
     """
-    There is a problem with the client API key.
+    There is a problem with the client OAuth token.
     """
 
 
@@ -48,7 +48,7 @@ class HttpClientError(MeetupHttpBaseException):
 
 class HttpUnauthorized(HttpClientError):
     """
-    Called when the server sends a 401 error (when you don't provide a valid key)
+    Called when the server sends a 401 error (when you don't provide a valid OAuth token)
     """
 
 
diff --git a/tests/test_client.py b/tests/test_client.py
index dfdfc88..14a817c 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -2,7 +2,7 @@
 import pytest
 
 from meetup import exceptions
-from meetup.api import API_KEY_ENV_NAME, Client, MeetupObject
+from meetup.api import TOKEN_ENV_NAME, Client, MeetupObject
 
 
 @pytest.fixture
@@ -11,20 +11,20 @@ def api_client():
 
 
 @pytest.mark.incremental
-class TestApiKey:
+class TestToken:
     def test_environment_key(self, api_client):
-        # Compare object API key with environment variable
-        assert api_client.api_key == os.environ.get(API_KEY_ENV_NAME)
+        # Compare object OAuth token with environment variable
+        assert api_client.token == os.environ.get(TOKEN_ENV_NAME)
 
     def test_empty_key(self, api_client):
-        # Undefined API Key should fail
-        api_client.api_key = None
-        with pytest.raises(exceptions.ApiKeyError):
+        # Undefined OAuth token should fail
+        api_client.token = None
+        with pytest.raises(exceptions.TokenError):
             api_client.GetDashboard()
 
     def test_invalid_key(self, api_client):
         # Same with invalid API Key
-        api_client.api_key = 'foobarbaz'
+        api_client.token = 'foobarbaz'
         with pytest.raises(exceptions.HttpUnauthorized):
             api_client.GetDashboard()
 
diff --git a/tox.ini b/tox.ini
index 9910458..d46cbc6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@ envlist=py27,py34,py35,coverage,flake8,docs
 
 [testenv]
 usedevelop=True
-passenv=MEETUP_API_KEY
+passenv=MEETUP_OAUTH_TOKEN
 deps=
     -rrequirements-dev.txt
     pytest-cov
@@ -33,3 +33,7 @@ changedir=docs
 deps=sphinx
 commands=
     make clean html
+
+[pytest]
+markers =
+    incremental: custom marker