diff --git a/pyproject.toml b/pyproject.toml
index 1c0ea4ff..953f7ac1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ line-length=100
 target-version = "py310"
 
 [tool.ruff.lint]
-extend-select = ["UP"]
+extend-select = ["CPY001", "UP"]
 
 [tool.ruff.lint.extend-per-file-ignores]
 # F401: imported but unused, common for __init__.py files