diff --git a/pyproject.toml b/pyproject.toml
index 788ca1f8..aa717a13 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,6 +72,7 @@ exclude = [
     "doc",
 ]
 
+[tool.ruff.lint]
 # E402: module level import not at top of file
 # E501: line too long - let black worry about that
 # E731: do not assign a lambda expression, use a def