diff --git a/AUTHORS.rst b/AUTHORS.rst
index 1bec7846cc..115b4e82d6 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -180,3 +180,4 @@ Patches and Suggestions
 - Matt Liu <liumatt@gmail.com> (`@mlcrazy <https://github.com/mlcrazy>`_)
 - Taylor Hoff <primdevs@protonmail.com> (`@PrimordialHelios <https://github.com/PrimordialHelios>`_)
 - Arthur Vigil (`@ahvigil <https://github.com/ahvigil>`_)
+- Matti Mäki (`@makimat <https://github.com/makimat>`_)
diff --git a/requests/cookies.py b/requests/cookies.py
index ab3c88b9bf..e14ce25370 100644
--- a/requests/cookies.py
+++ b/requests/cookies.py
@@ -10,6 +10,7 @@
 """
 
 import copy
+import datetime
 import time
 import calendar
 import collections
@@ -475,6 +476,8 @@ def morsel_to_cookie(morsel):
     expires = None
     if morsel['max-age']:
         try:
+            _ = datetime.datetime.now()
+            print(_)
             expires = int(time.time() + int(morsel['max-age']))
         except ValueError:
             raise TypeError('max-age: %s must be integer' % morsel['max-age'])
diff --git a/requests/models.py b/requests/models.py
index 4041cac3f0..4392974fa0 100644
--- a/requests/models.py
+++ b/requests/models.py
@@ -26,7 +26,7 @@
 from .hooks import default_hooks
 from .structures import CaseInsensitiveDict
 
-from .auth import HTTPBasicAuth
+from .auth import HTTPBasicAuth, HTTPDigestAuth
 from .cookies import cookiejar_from_dict, get_cookie_header, _copy_cookie_jar
 from .exceptions import (
     HTTPError, MissingSchema, InvalidURL, ChunkedEncodingError,
@@ -536,6 +536,9 @@ def prepare_auth(self, auth, url=''):
                 # special-case basic HTTP auth
                 auth = HTTPBasicAuth(*auth)
 
+                if not auth:
+                    auth = HTTPDigestAuth(*auth)
+
             # Allow auth to make its changes.
             r = auth(self)