diff --git a/cms/djangoapps/cms_user_tasks/tasks.py b/cms/djangoapps/cms_user_tasks/tasks.py
index 521d65746f..e06c58b6f0 100644
--- a/cms/djangoapps/cms_user_tasks/tasks.py
+++ b/cms/djangoapps/cms_user_tasks/tasks.py
@@ -3,7 +3,7 @@ Celery tasks used by cms_user_tasks
 """
 import json
 
-from boto.exception import NoAuthHandlerFound
+import botocore
 from celery import shared_task
 from celery.exceptions import MaxRetriesExceededError
 from celery.utils.log import get_task_logger
@@ -52,7 +52,7 @@ def send_task_complete_email(self, task_name, task_state_text, dest_addr, detail
     try:
         mail.send_mail(subject, message, from_address, [dest_addr], fail_silently=False)
         LOGGER.info("Task complete email has been sent to User %s", dest_addr)
-    except NoAuthHandlerFound:
+    except botocore.exceptions.ClientError:
         LOGGER.info(
             'Retrying sending email to user %s, attempt # %s of %s',
             dest_addr,
diff --git a/cms/djangoapps/cms_user_tasks/tests.py b/cms/djangoapps/cms_user_tasks/tests.py
index 77afca6a2c..f50e5002fe 100644
--- a/cms/djangoapps/cms_user_tasks/tests.py
+++ b/cms/djangoapps/cms_user_tasks/tests.py
@@ -7,8 +7,8 @@ from unittest import mock
 from unittest.mock import patch
 from uuid import uuid4
 
+import botocore
 import ddt
-from boto.exception import NoAuthHandlerFound
 from django.conf import settings
 from django.core import mail
 from django.test import override_settings
@@ -303,7 +303,9 @@ class TestUserTaskStopped(APITestCase):
         Make sure we can succeed on retries
         """
         with mock.patch('django.core.mail.send_mail') as mock_exception:
-            mock_exception.side_effect = NoAuthHandlerFound()
+            mock_exception.side_effect = botocore.exceptions.ClientError(
+                {'error_response': 'error occurred'}, {'operation_name': 'test'}
+            )
 
             with mock.patch('cms.djangoapps.cms_user_tasks.tasks.send_task_complete_email.retry') as mock_retry:
                 user_task_stopped.send(sender=UserTaskStatus, status=self.status)
@@ -315,7 +317,9 @@ class TestUserTaskStopped(APITestCase):
         logger.addHandler(hdlr)
 
         with mock.patch('cms.djangoapps.cms_user_tasks.tasks.send_task_complete_email.delay') as mock_delay:
-            mock_delay.side_effect = NoAuthHandlerFound()
+            mock_delay.side_effect = botocore.exceptions.ClientError(
+                {'error_response': 'error occurred'}, {'operation_name': 'test'}
+            )
             user_task_stopped.send(sender=UserTaskStatus, status=self.status)
             self.assertTrue(mock_delay.called)
             self.assertEqual(hdlr.messages['error'][0], 'Unable to queue send_task_complete_email')
diff --git a/cms/djangoapps/contentstore/storage.py b/cms/djangoapps/contentstore/storage.py
index f3a04fbd21..9719d052b8 100644
--- a/cms/djangoapps/contentstore/storage.py
+++ b/cms/djangoapps/contentstore/storage.py
@@ -5,11 +5,11 @@ Storage backend for course import and export.
 
 from django.conf import settings
 from django.core.files.storage import get_storage_class
-from storages.backends.s3boto import S3BotoStorage
+from storages.backends.s3boto3 import S3Boto3Storage
 from storages.utils import setting
 
 
-class ImportExportS3Storage(S3BotoStorage):  # pylint: disable=abstract-method
+class ImportExportS3Storage(S3Boto3Storage):  # pylint: disable=abstract-method
     """
     S3 backend for course import and export OLX files.
     """
diff --git a/cms/djangoapps/export_course_metadata/storage.py b/cms/djangoapps/export_course_metadata/storage.py
index d010dd7bd2..02a78e4a9c 100644
--- a/cms/djangoapps/export_course_metadata/storage.py
+++ b/cms/djangoapps/export_course_metadata/storage.py
@@ -5,10 +5,10 @@ Storage backend for course metadata export.
 
 from django.conf import settings
 from django.core.files.storage import get_storage_class
-from storages.backends.s3boto import S3BotoStorage
+from storages.backends.s3boto3 import S3Boto3Storage
 
 
-class CourseMetadataExportS3Storage(S3BotoStorage):  # pylint: disable=abstract-method
+class CourseMetadataExportS3Storage(S3Boto3Storage):  # pylint: disable=abstract-method
     """
     S3 backend for course metadata export
     """
diff --git a/cms/djangoapps/export_course_metadata/tasks.py b/cms/djangoapps/export_course_metadata/tasks.py
index 2fb33cd0e8..63974efb0f 100644
--- a/cms/djangoapps/export_course_metadata/tasks.py
+++ b/cms/djangoapps/export_course_metadata/tasks.py
@@ -29,5 +29,5 @@ def export_course_metadata_task(self, course_key_string):  # pylint: disable=unu
     """
     course_key = CourseKey.from_string(course_key_string)
     highlights = get_all_course_highlights(course_key)
-    highlights_content = ContentFile(json.dumps({'highlights': highlights}))
+    highlights_content = ContentFile(json.dumps({'highlights': highlights}).encode('utf-8'))
     course_metadata_export_storage.save(f'course_metadata_export/{course_key}.json', highlights_content)
diff --git a/cms/djangoapps/export_course_metadata/test_signals.py b/cms/djangoapps/export_course_metadata/test_signals.py
index 9141790144..5e71887f2b 100644
--- a/cms/djangoapps/export_course_metadata/test_signals.py
+++ b/cms/djangoapps/export_course_metadata/test_signals.py
@@ -48,7 +48,7 @@ class TestExportCourseMetadata(SharedModuleStoreTestCase):
         SignalHandler.course_published.connect(export_course_metadata)
         SignalHandler.course_published.send(sender=None, course_key=self.course_key)
         patched_content.assert_called_once_with(
-            '{"highlights": [["week1highlight1", "week1highlight2"], ["week1highlight1", "week1highlight2"], [], []]}'
+            b'{"highlights": [["week1highlight1", "week1highlight2"], ["week1highlight1", "week1highlight2"], [], []]}'
         )
         patched_storage.save.assert_called_once_with(
             f'course_metadata_export/{self.course_key}.json', patched_content.return_value