diff --git a/common/djangoapps/student/tests/test_email.py b/common/djangoapps/student/tests/test_email.py
index 7e0137dd84..95f5af6881 100644
--- a/common/djangoapps/student/tests/test_email.py
+++ b/common/djangoapps/student/tests/test_email.py
@@ -292,7 +292,7 @@ class EmailChangeRequestTests(EventTestMixin, EmailTemplateTagMixin, CacheIsolat
         """
         self.assertEqual(self.do_email_validation(self.user.email), 'Old email is the same as the new email.')
 
-    @patch('django.core.mail.send_mail')
+    @patch('django.core.mail.EmailMultiAlternatives.send')
     def test_email_failure(self, send_mail):
         """
         Test the return value if sending the email for the user to click fails.
@@ -590,7 +590,7 @@ class SecondaryEmailChangeRequestTests(EventTestMixin, EmailTemplateTagMixin, Ca
         for email in ('bad_email', 'bad_email@', '@bad_email'):
             self.assertEqual(self.do_email_validation(email), 'Valid e-mail address required.')
 
-    @patch('django.core.mail.send_mail')
+    @patch('django.core.mail.EmailMultiAlternatives.send')
     def test_email_failure(self, send_mail):
         """
         Test the return value if sending the email for the user to click fails.
diff --git a/openedx/core/djangoapps/user_api/accounts/tests/test_api.py b/openedx/core/djangoapps/user_api/accounts/tests/test_api.py
index b9b48fbe3c..e1b8ee63bb 100644
--- a/openedx/core/djangoapps/user_api/accounts/tests/test_api.py
+++ b/openedx/core/djangoapps/user_api/accounts/tests/test_api.py
@@ -367,7 +367,7 @@ class TestAccountApi(UserSettingsEventTestMixin, EmailTemplateTagMixin, CreateAc
         self.assertIn("Valid e-mail address required.", field_errors["email"]["developer_message"])
         self.assertIn("Full Name cannot contain the following characters: < >", field_errors["name"]["user_message"])
 
-    @patch('django.core.mail.send_mail')
+    @patch('django.core.mail.EmailMultiAlternatives.send')
     @patch('student.views.management.render_to_string', Mock(side_effect=mock_render_to_string, autospec=True))
     def test_update_sending_email_fails(self, send_mail):
         """Test what happens if all validation checks pass, but sending the email for email change fails."""
diff --git a/openedx/core/djangoapps/user_authn/views/tests/test_reset_password.py b/openedx/core/djangoapps/user_authn/views/tests/test_reset_password.py
index a4b1ec1b24..cca7a87a06 100644
--- a/openedx/core/djangoapps/user_authn/views/tests/test_reset_password.py
+++ b/openedx/core/djangoapps/user_authn/views/tests/test_reset_password.py
@@ -191,10 +191,9 @@ class ResetPasswordTests(EventTestMixin, CacheIsolationTestCase):
         re.search(r'password_reset_confirm/(?P<uidb36>[0-9A-Za-z]+)-(?P<token>.+)/', body).groupdict()
 
     @unittest.skipUnless(settings.ROOT_URLCONF == 'lms.urls', "Test only valid in LMS")
-    @patch('django.core.mail.send_mail')
     @ddt.data((False, 'http://'), (True, 'https://'))
     @ddt.unpack
-    def test_reset_password_email_https(self, is_secure, protocol, send_email):
+    def test_reset_password_email_https(self, is_secure, protocol):
         """
         Tests that the right url protocol is included in the reset password link
         """
@@ -205,7 +204,8 @@ class ResetPasswordTests(EventTestMixin, CacheIsolationTestCase):
         req.is_secure = Mock(return_value=is_secure)
         req.user = self.user
         password_reset(req)
-        _, msg, _, _ = send_email.call_args[0]
+        sent_message = mail.outbox[0]
+        msg = sent_message.body
         expected_msg = "Please go to the following page and choose a new password:\n\n" + protocol
 
         self.assertIn(expected_msg, msg)
@@ -215,10 +215,9 @@ class ResetPasswordTests(EventTestMixin, CacheIsolationTestCase):
         )
 
     @unittest.skipUnless(settings.ROOT_URLCONF == 'lms.urls', "Test only valid in LMS")
-    @patch('django.core.mail.send_mail')
     @ddt.data(('Crazy Awesome Site', 'Crazy Awesome Site'), ('edX', 'edX'))
     @ddt.unpack
-    def test_reset_password_email_site(self, site_name, platform_name, send_email):
+    def test_reset_password_email_site(self, site_name, platform_name):
         """
         Tests that the right url domain and platform name is included in
         the reset password email
@@ -231,7 +230,8 @@ class ResetPasswordTests(EventTestMixin, CacheIsolationTestCase):
                 req.user = self.user
                 req.site = Mock(domain='example.com')
                 password_reset(req)
-                _, msg, _, _ = send_email.call_args[0]
+                sent_message = mail.outbox[0]
+                msg = sent_message.body
 
                 reset_msg = u"you requested a password reset for your user account at {}"
                 reset_msg = reset_msg.format(site_name)
@@ -468,9 +468,8 @@ class ResetPasswordTests(EventTestMixin, CacheIsolationTestCase):
         self.assertTrue(self.user.is_active)
 
     @unittest.skipUnless(settings.ROOT_URLCONF == 'lms.urls', "Test only valid in LMS")
-    @patch('django.core.mail.send_mail')
     @ddt.data('Crazy Awesome Site', 'edX')
-    def test_reset_password_email_subject(self, platform_name, send_email):
+    def test_reset_password_email_subject(self, platform_name):
         """
         Tests that the right platform name is included in
         the reset password email subject
@@ -482,7 +481,8 @@ class ResetPasswordTests(EventTestMixin, CacheIsolationTestCase):
             req.user = self.user
             req.site = Mock(domain='example.com')
             password_reset(req)
-            subj, _, _, _ = send_email.call_args[0]
+            sent_message = mail.outbox[0]
+            subj = sent_message.subject
 
             self.assertIn(platform_name, subj)
 
diff --git a/requirements/edx/base.in b/requirements/edx/base.in
index def05a9d29..46a5e7fb4a 100644
--- a/requirements/edx/base.in
+++ b/requirements/edx/base.in
@@ -67,7 +67,7 @@ django-webpack-loader               # Used to wire webpack bundles into the djan
 djangorestframework==3.7.7
 djangorestframework-jwt
 drf-yasg                            # Replacement for django-rest-swagger
-edx-ace==0.1.10
+edx-ace
 edx-analytics-data-api-client
 edx-bulk-grades                     # LMS REST API for managing bulk grading operations
 edx-ccx-keys
@@ -75,7 +75,7 @@ edx-celeryutils
 edx-completion
 edx-django-oauth2-provider
 edx-django-release-util             # Release utils for the edx release pipeline
-edx-django-sites-extensions==2.3.1
+edx-django-sites-extensions
 edx-django-utils
 edx-drf-extensions
 edx-enterprise
diff --git a/requirements/edx/base.txt b/requirements/edx/base.txt
index cf2b881f3b..f6e4809c44 100644
--- a/requirements/edx/base.txt
+++ b/requirements/edx/base.txt
@@ -25,7 +25,7 @@ aniso8601==8.0.0          # via tincan
 anyjson==0.3.3            # via kombu
 appdirs==1.4.3            # via fs
 argh==0.26.2
-attrs==17.4.0
+attrs==19.3.0
 babel==1.3
 backports.functools-lru-cache==1.6.1  # via soupsieve
 beautifulsoup4==4.8.1     # via pynliner
@@ -94,7 +94,7 @@ djangorestframework==3.7.7
 docopt==0.6.2
 docutils==0.15.2          # via botocore
 drf-yasg==1.16
-edx-ace==0.1.10
+edx-ace==0.1.13
 edx-analytics-data-api-client==0.15.3
 edx-bulk-grades==0.6.6
 edx-ccx-keys==1.0.0
@@ -102,7 +102,7 @@ edx-celeryutils==0.3.1
 edx-completion==3.0.2
 edx-django-oauth2-provider==1.3.5
 edx-django-release-util==0.3.2
-edx-django-sites-extensions==2.3.1
+edx-django-sites-extensions==2.4.2
 edx-django-utils==2.0.2
 edx-drf-extensions==2.4.5
 edx-enterprise==2.0.32
diff --git a/requirements/edx/development.txt b/requirements/edx/development.txt
index 05999b2e55..34636e0238 100644
--- a/requirements/edx/development.txt
+++ b/requirements/edx/development.txt
@@ -30,7 +30,7 @@ argh==0.26.2
 argparse==1.4.0
 astroid==1.5.3
 atomicwrites==1.3.0
-attrs==17.4.0
+attrs==19.3.0
 aws-xray-sdk==0.95
 babel==1.3
 backports.functools-lru-cache==1.6.1
@@ -116,7 +116,7 @@ docker==4.1.0
 docopt==0.6.2
 docutils==0.15.2
 drf-yasg==1.16
-edx-ace==0.1.10
+edx-ace==0.1.13
 edx-analytics-data-api-client==0.15.3
 edx-bulk-grades==0.6.6
 edx-ccx-keys==1.0.0
@@ -124,7 +124,7 @@ edx-celeryutils==0.3.1
 edx-completion==3.0.2
 edx-django-oauth2-provider==1.3.5
 edx-django-release-util==0.3.2
-edx-django-sites-extensions==2.3.1
+edx-django-sites-extensions==2.4.2
 edx-django-utils==2.0.2
 edx-drf-extensions==2.4.5
 edx-enterprise==2.0.32
diff --git a/requirements/edx/testing.txt b/requirements/edx/testing.txt
index 4cd73353f4..598c2f54f7 100644
--- a/requirements/edx/testing.txt
+++ b/requirements/edx/testing.txt
@@ -29,7 +29,7 @@ argh==0.26.2
 argparse==1.4.0           # via caniusepython3
 astroid==1.5.3            # via pylint, pylint-celery
 atomicwrites==1.3.0       # via pytest
-attrs==17.4.0
+attrs==19.3.0
 aws-xray-sdk==0.95        # via moto
 babel==1.3
 backports.functools-lru-cache==1.6.1
@@ -113,7 +113,7 @@ docker==4.1.0             # via moto
 docopt==0.6.2
 docutils==0.15.2
 drf-yasg==1.16
-edx-ace==0.1.10
+edx-ace==0.1.13
 edx-analytics-data-api-client==0.15.3
 edx-bulk-grades==0.6.6
 edx-ccx-keys==1.0.0
@@ -121,7 +121,7 @@ edx-celeryutils==0.3.1
 edx-completion==3.0.2
 edx-django-oauth2-provider==1.3.5
 edx-django-release-util==0.3.2
-edx-django-sites-extensions==2.3.1
+edx-django-sites-extensions==2.4.2
 edx-django-utils==2.0.2
 edx-drf-extensions==2.4.5
 edx-enterprise==2.0.32