diff --git a/setup.cfg b/setup.cfg
index 1af9e2c3f93..b3f95d39d36 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,6 +3,7 @@ ensure_newline_before_comments = True
 force_grid_wrap = 0
 include_trailing_comma = True
 known_first_party = transformers
+known_third_party = packaging
 line_length = 119
 lines_after_imports = 2
 multi_line_output = 3