diff --git a/core/models/__init__.py b/core/models/__init__.py
index 7136fd16..f3795655 100755
--- a/core/models/__init__.py
+++ b/core/models/__init__.py
@@ -13,7 +13,8 @@ from tempfile import SpooledTemporaryFile
 import requests
 from ckeditor.fields import RichTextField
 from notification import models as notification
-from postmonkey import PostMonkey, MailChimpException
+from mailchimp3 import MailChimp
+from mailchimp3.mailchimpclient import MailChimpError
 
 #django imports
 from django.apps import apps
@@ -95,7 +96,7 @@ from .bibmodels import (
 )
 
 from .rh_models import Claim, RightsHolder
-pm = PostMonkey(settings.MAILCHIMP_API_KEY)
+mc_client = MailChimp(mc_api=settings.MAILCHIMP_API_KEY)
 
 logger = logging.getLogger(__name__)
 
@@ -1256,10 +1257,17 @@ class UserProfile(models.Model):
             # use @example.org email addresses for testing!
             return False
         try:
-            return settings.MAILCHIMP_NEWS_ID in pm.listsForEmail(email_address=self.user.email)
-        except MailChimpException, e:
-            if e.code != 215: # don't log case where user is not on a list
+            member = mc_client.lists.members.get(
+                list_id=settings.MAILCHIMP_NEWS_ID,
+                subscriber_hash=self.user.email
+            )
+            if member['status'] == 'subscribed':
+                return 'True'
+        except MailChimpError, e:
+            if e[0]['status'] != 404: # don't log case where user is not on a list
                 logger.error("error getting mailchimp status  %s" % (e))
+        except ValueError, e:
+            logger.error("bad email address  %s" % (self.user.email))
         except Exception, e:
             logger.error("error getting mailchimp status  %s" % (e))
         return False
@@ -1267,7 +1275,7 @@ class UserProfile(models.Model):
     def ml_subscribe(self, **kwargs):
         if "@example.org" in self.user.email:
             # use @example.org email addresses for testing!
-            return True
+            return
         from regluit.core.tasks import ml_subscribe_task
         ml_subscribe_task.delay(self, **kwargs)
 
@@ -1276,7 +1284,14 @@ class UserProfile(models.Model):
             # use @example.org email addresses for testing!
             return True
         try:
-            return pm.listUnsubscribe(id=settings.MAILCHIMP_NEWS_ID, email_address=self.user.email)
+            mc_client.lists.members.delete(
+                list_id=settings.MAILCHIMP_NEWS_ID,
+                subscriber_hash=self.user.email,
+            )
+            return True
+        except MailChimpError, e:
+            if e[0]['status'] != 404: # don't log case where user is not on a list
+                logger.error("error getting mailchimp status  %s" % (e))
         except Exception, e:
             logger.error("error unsubscribing from mailchimp list  %s" % (e))
         return False
diff --git a/core/tasks.py b/core/tasks.py
index 8a10b2f1..7095d5d6 100644
--- a/core/tasks.py
+++ b/core/tasks.py
@@ -17,6 +17,10 @@ from django.utils.timezone import now
 from notification.engine import send_all
 from notification import models as notification
 
+from mailchimp3 import MailChimp
+from mailchimp3.mailchimpclient import MailChimpError
+
+
 """
 regluit imports
 """
@@ -33,6 +37,7 @@ from regluit.core.parameters import RESERVE, REWARDS, THANKS
 from regluit.utils.localdatetime import date_today
 
 logger = logging.getLogger(__name__)
+mc_client = MailChimp(mc_api=settings.MAILCHIMP_API_KEY)
 
 @task 
 def populate_edition(isbn):
@@ -183,14 +188,17 @@ def convert_to_mobi(input_url, input_format="application/epub+zip"):
 def generate_mobi_ebook_for_edition(edition):
     return mobigen.generate_mobi_ebook_for_edition(edition)
 
-from postmonkey import PostMonkey, MailChimpException
-pm = PostMonkey(settings.MAILCHIMP_API_KEY)
-
 @task
 def ml_subscribe_task(profile, **kwargs):
     try:
         if not profile.on_ml:
-            return pm.listSubscribe(id=settings.MAILCHIMP_NEWS_ID, email_address=profile.user.email, **kwargs)
+            data = {"email_address": profile.user.email, "status_if_new": "pending"}
+            mc_client.lists.members.create_or_update(
+                list_id=settings.MAILCHIMP_NEWS_ID,
+                subscriber_hash=profile.user.email,
+                data=data,
+            )
+            return True
     except Exception, e:
         logger.error("error subscribing to mailchimp list %s" % (e))
         return False
diff --git a/core/tests.py b/core/tests.py
index d684a9ef..2b15e5e7 100755
--- a/core/tests.py
+++ b/core/tests.py
@@ -1010,10 +1010,11 @@ class MailingListTests(TestCase):
     #mostly to check that MailChimp account is setp correctly
 
     def test_mailchimp(self):
-        from postmonkey import PostMonkey
-        pm = PostMonkey(settings.MAILCHIMP_API_KEY)
+        from mailchimp3 import MailChimp
+        mc_client = MailChimp(settings.MAILCHIMP_API_KEY)
         if settings.TEST_INTEGRATION:
-            self.assertEqual(pm.ping(), "Everything's Chimpy!")
+            root = mc_client.root.get()
+            self.assertEqual(root[u'account_id'], u'15472878790f9faa11317e085')
             self.user = User.objects.create_user('chimp_test', 'eric@gluejar.com', 'chimp_test')
             self.assertTrue(self.user.profile.on_ml)
 
diff --git a/requirements_versioned.pip b/requirements_versioned.pip
index b668a74d..f1e0f02d 100644
--- a/requirements_versioned.pip
+++ b/requirements_versioned.pip
@@ -58,7 +58,7 @@ oauth2==1.5.211
 oauthlib==1.1.2
 pandas==0.19.1
 paramiko==1.14.1
-postmonkey==1.0b
+mailchimp3==3.0.4
 pycrypto==2.6
 pymarc==3.0.2
 pyoai==2.5.0