diff --git a/pyproject.toml b/pyproject.toml
index 90dd194..44fe0c8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,7 +53,6 @@ dependencies = [
 	"greenlet",
 ]
 
-[tool.pdm]
 [tool.pdm.dev-dependencies]
 dev = [
 	"mypy",
@@ -71,6 +70,9 @@ dev = [
 [tool.pdm.build]
 includes = []
 
+[tool.ruff.lint]
+select = ["E4", "E7", "E9", "F", "I"]
+
 [build-system]
 requires = ["pdm-backend"]
 build-backend = "pdm.backend"