diff --git a/setup.cfg b/setup.cfg
index 88fa807e8b..0c96005f23 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -41,4 +41,7 @@ exclude=migrations,.git,.pycharm_helpers,.tox,test_root/staticfiles,node_modules
 indent='    '
 line_length=120
 multi_line_output=3
-skip=envs,migrations
+skip=
+    envs
+    migrations
+    common/lib/safe_lxml/safe_lxml/etree.py