diff --git a/requests_oauthlib/oauth1_auth.py b/requests_oauthlib/oauth1_auth.py
index 303ecd21..46263841 100644
--- a/requests_oauthlib/oauth1_auth.py
+++ b/requests_oauthlib/oauth1_auth.py
@@ -8,6 +8,7 @@
 from oauthlib.oauth1 import SIGNATURE_TYPE_BODY
 from requests.compat import is_py3
 from requests.utils import to_native_string
+from requests.auth import AuthBase
 
 CONTENT_TYPE_FORM_URLENCODED = 'application/x-www-form-urlencoded'
 CONTENT_TYPE_MULTI_PART = 'multipart/form-data'
@@ -20,7 +21,7 @@
 # OBS!: Correct signing of requests are conditional on invoking OAuth1
 # as the last step of preparing a request, or at least having the
 # content-type set properly.
-class OAuth1(object):
+class OAuth1(AuthBase):
     """Signs the request using OAuth 1 (RFC5849)"""
 
     client_class = Client
diff --git a/requests_oauthlib/oauth2_auth.py b/requests_oauthlib/oauth2_auth.py
index 42366e74..0ce58cc9 100644
--- a/requests_oauthlib/oauth2_auth.py
+++ b/requests_oauthlib/oauth2_auth.py
@@ -1,9 +1,10 @@
 from __future__ import unicode_literals
 from oauthlib.oauth2 import WebApplicationClient, InsecureTransportError
 from oauthlib.oauth2 import is_secure_transport
+from requests.auth import AuthBase
 
 
-class OAuth2(object):
+class OAuth2(AuthBase):
     """Adds proof of authorization (OAuth2 token) to the request."""
 
     def __init__(self, client_id=None, client=None, token=None):