diff --git a/pyproject.toml b/pyproject.toml
index 4519a7e674f..8e1455d18f4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -77,6 +77,7 @@ ignore = [
  "S103",  # bad-file-permissions
  "S110",  # try-except-pass
  "UP006",  # use-pep585-annotation
+ "UP007",  # typing-union (Py3.9+)
  "UP003",  # type-of-primitive
  "UP012",  # unnecessary-encode-utf8
  #"UP016",  # remove-six-compat