diff --git a/Makefile b/Makefile
index 17308d8..057cd6b 100644
--- a/Makefile
+++ b/Makefile
@@ -15,6 +15,7 @@ freeze:
 lint:
 	python -m flake8 soft_webauthn.py tests
 	python -m pylint --ignore=example_server.py soft_webauthn.py tests
+	python -m black --check soft_webauthn.py tests
 
 test:
 	python -m pytest -v
@@ -23,6 +24,9 @@ coverage:
 	coverage run --source soft_webauthn -m pytest tests -x -vv
 	coverage report --show-missing --fail-under 100
 
+black:
+	python -m black soft_webauthn.py tests
+
 wheel:
 	python setup.py sdist bdist_wheel
 upload:
diff --git a/requirements-dev.lock b/requirements-dev.lock
index 357ee91..d1332d9 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -1,5 +1,6 @@
 astroid==2.11.6
 attrs==21.4.0
+black==23.3.0
 cffi==1.15.1
 click==8.1.3
 coverage==6.4.1
@@ -16,7 +17,9 @@ Jinja2==3.1.2
 lazy-object-proxy==1.7.1
 MarkupSafe==2.1.1
 mccabe==0.6.1
-packaging==21.3
+mypy-extensions==1.0.0
+packaging==23.1
+pathspec==0.11.1
 platformdirs==2.5.2
 pluggy==1.0.0
 py==1.11.0
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 251451c..ae7a66b 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,4 @@
+black
 coverage
 flake8
 flask