diff --git a/requirements.txt b/requirements.txt
index cde85f8ff..20c7d2a35 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ binaryornot==0.4.4
 
 # Code quality
 # ------------------------------------------------------------------------------
-black==21.8b0
+black==21.9b0
 isort==5.9.3
 flake8==3.9.2
 flake8-isort==4.0.0
diff --git a/{{cookiecutter.project_slug}}/requirements/local.txt b/{{cookiecutter.project_slug}}/requirements/local.txt
index cd08220aa..5632f5b21 100644
--- a/{{cookiecutter.project_slug}}/requirements/local.txt
+++ b/{{cookiecutter.project_slug}}/requirements/local.txt
@@ -28,7 +28,7 @@ sphinx-autobuild==2021.3.14 # https://github.com/GaretJax/sphinx-autobuild
 flake8==3.9.2  # https://github.com/PyCQA/flake8
 flake8-isort==4.0.0  # https://github.com/gforcada/flake8-isort
 coverage==5.5  # https://github.com/nedbat/coveragepy
-black==21.8b0  # https://github.com/psf/black
+black==21.9b0  # https://github.com/psf/black
 pylint-django==2.4.4  # https://github.com/PyCQA/pylint-django
 {%- if cookiecutter.use_celery == 'y' %}
 pylint-celery==0.3  # https://github.com/PyCQA/pylint-celery