diff --git a/pyproject.toml b/pyproject.toml
index 53926cf..30388d2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -92,6 +92,7 @@ ignore = [
     "COM812", # flake8-commas "Trailing comma missing"
     "ISC001", # flake8-implicit-str-concat
     "PT028", # Test function has default argument
+    "CPY001", # no per-file copyright header
 ]
 isort.lines-after-imports = 2
 isort.no-lines-before = ["standard-library", "local-folder"]