diff --git a/poll/poll.py b/poll/poll.py
index dca03ad..3c3c5c3 100644
--- a/poll/poll.py
+++ b/poll/poll.py
@@ -32,14 +32,19 @@
 import six
 from django import utils
 from markdown import markdown
-from webob import Response
 from xblock.completable import XBlockCompletionMode
 from xblock.core import XBlock
 from xblock.fields import Boolean, Dict, Integer, List, Scope, String
+try:
+    from xblock.utils.publish_event import PublishEventMixin
+    from xblock.utils.resources import ResourceLoader
+    from xblock.utils.settings import ThemableXBlockMixin, XBlockWithSettingsMixin
+except ModuleNotFoundError:  # For backward compatibility with releases older than Quince.
+    from xblockutils.publish_event import PublishEventMixin
+    from xblockutils.resources import ResourceLoader
+    from xblockutils.settings import ThemableXBlockMixin, XBlockWithSettingsMixin
+from webob import Response
 from web_fragments.fragment import Fragment
-from xblockutils.publish_event import PublishEventMixin
-from xblockutils.resources import ResourceLoader
-from xblockutils.settings import ThemableXBlockMixin, XBlockWithSettingsMixin
 
 from .utils import DummyTranslationService, _, remove_markdown_and_html_tags
 
diff --git a/setup.py b/setup.py
index df5af4b..59e5912 100644
--- a/setup.py
+++ b/setup.py
@@ -48,7 +48,7 @@ def package_data(pkg, roots):
 
 setup(
     name='xblock-poll',
-    version='1.13.0',
+    version='1.13.1',
     description='An XBlock for polling users.',
     long_description=README,
     long_description_content_type='text/markdown',
diff --git a/tests/integration/base_test.py b/tests/integration/base_test.py
index efedcf4..5bae789 100644
--- a/tests/integration/base_test.py
+++ b/tests/integration/base_test.py
@@ -22,9 +22,9 @@
 #
 
 from __future__ import absolute_import
-from xblockutils.base_test import SeleniumBaseTest
 from mock import patch
 
+from xblock.utils.base_test import SeleniumBaseTest
 
 # Default names for inputs for polls/surveys
 DEFAULT_SURVEY_NAMES = ('enjoy', 'recommend', 'learn')