diff --git a/Makefile b/Makefile
index 81efe29..31e5c93 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ tests:
 
 .PHONY: format ## Format code
 format:
-	tox -e pre-commit
+	black graphene_django examples setup.py
 
 .PHONY: lint ## Lint code
 lint:
diff --git a/setup.py b/setup.py
index bccf8c8..cef9dc1 100644
--- a/setup.py
+++ b/setup.py
@@ -26,6 +26,7 @@ tests_require = [
 
 
 dev_requires = [
+    "black",
     "ruff",
     "pre-commit",
 ] + tests_require