diff --git a/openedx/core/djangoapps/ace_common/settings/common.py b/openedx/core/djangoapps/ace_common/settings/common.py
index d4b010f453..c1c751ba72 100644
--- a/openedx/core/djangoapps/ace_common/settings/common.py
+++ b/openedx/core/djangoapps/ace_common/settings/common.py
@@ -1,3 +1,8 @@
+"""
+Settings for ace_common app.
+"""
+
+
 def plugin_settings(settings):  # lint-amnesty, pylint: disable=missing-function-docstring, missing-module-docstring
     settings.ACE_ENABLED_CHANNELS = [
         'django_email'