diff --git a/Makefile b/Makefile
index 6472535..ce52ca5 100644
--- a/Makefile
+++ b/Makefile
@@ -12,11 +12,11 @@ tests:
 .PHONY: reformat
 reformat:
 	ruff format .
-	ruff --fix .
+	ruff check . --fix
 
 .PHONY: lint
 lint:
-	ruff .
+	ruff check .
 
 .PHONY: docs
 docs: clean
diff --git a/pyproject.toml b/pyproject.toml
index 97f3c24..ccd1156 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,6 +44,11 @@ Source = "https://github.com/zostera/django-icons"
 
 [tool.ruff]
 fix = false
+line-length = 120
+src = ["src"]
+target-version = "py38"
+
+[tool.ruff.lint]
 fixable = [
   "I001", # isort (sorting)
   "F", # flake8
@@ -56,7 +61,6 @@ ignore = [
   "D212", # D212: Multi-line docstring summary should start at the first line
   "D301", # D301: Use r”“” if any backslashes in a docstring (unclear how else to handle backslashes in docstrings)
 ]
-line-length = 120
 select = [
   "D", # pydocstyle
   "E", # pycodestyle
@@ -64,13 +68,11 @@ select = [
   "I", # isort
   "UP", # pyupgrade
 ]
-src = ["src"]
-target-version = "py38"
 unfixable = [
   "F8", # names in flake8, such as defined but unused variables
 ]
 
-[tool.ruff.isort]
+[tool.ruff.lint.isort]
 known-first-party = ["django_marina", "app"]
 known-third-party = ["django"]
 
diff --git a/requirements-test.txt b/requirements-test.txt
index 0e18415..43a8683 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,3 +1,3 @@
 tox==4.14.2
 coverage==7.4.4
-ruff==0.3.7
+ruff==0.4.1