diff --git a/pyproject.toml b/pyproject.toml
index 0ad9675..c4c3e4f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,6 +40,20 @@ classifiers = [
 dependencies = [
   "django>=3.2",
 ]
+optional-dependencies.dev = [
+  "django-stubs[compatible-mypy]",
+  "jinja2>=2.9.6",
+  "mypy",
+  "pre-commit",
+  "pytest",
+  "pytest-cov",
+  "pytest-django",
+  "pytest-ruff",
+  "Sphinx",
+  "sphinx_rtd_theme",
+  "tox",
+  "types-setuptools",
+]
 optional-dependencies.jinja2 = [
   "jinja2>=2.9.6",
 ]
@@ -51,12 +65,12 @@ optional-dependencies.tests = [
   "pytest-ruff",
 ]
 optional-dependencies.typing = [
+  "django-stubs[compatible-mypy]",
   "jinja2>=2.9.6",
+  "mypy",
   "pytest",
   "pytest-django",
-  "mypy",
   "types-setuptools",
-  "django-stubs[compatible-mypy]",
 ]
 urls."Bug Tracker" = "https://github.com/mozilla/django-csp/issues"
 urls.Changelog = "https://github.com/mozilla/django-csp/blob/main/CHANGES"