diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 0000000..e9f3bf4
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,2 @@
+# misc: apply pyupgrade/isort/black (#56062)
+65d33f00b7a0e9b5c75dde1b92c1484de740030e
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..b5353c2
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,18 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/asottile/pyupgrade
+    rev: v2.20.0
+    hooks:
+    - id: pyupgrade
+      args: ['--keep-percent-format', '--py37-plus']
+-   repo: https://github.com/PyCQA/isort
+    rev: 5.7.0
+    hooks:
+    - id: isort
+      args: ['--profile', 'black', '--line-length', '110']
+-   repo: https://github.com/psf/black
+    rev: 20.8b1
+    hooks:
+    - id: black
+      args: ['--target-version', 'py37', '--skip-string-normalization', '--line-length', '110']
diff --git a/README.rst b/README.rst
index d66c825..0968de5 100644
--- a/README.rst
+++ b/README.rst
@@ -220,3 +220,25 @@ measures also in the same ordre as the query.
 The `count` measure is a special measure which is always present whose
 expression is always `count({fact_table}.{key})` where `fact_table` and `key`
 are the corresponding attributes of the cube.
+
+Code Style
+==========
+
+black is used to format the code, using thoses parameters:
+
+    black --target-version py37 --skip-string-normalization --line-length 110
+
+There is .pre-commit-config.yaml to use pre-commit to automatically run black
+before commits. (execute `pre-commit install` to install the git hook.)
+
+isort is used to format the imports, using those parameter:
+
+    isort --profile black --line-length 110
+
+pyupgrade is used to automatically upgrade syntax, using those parameters:
+
+    pyupgrade --keep-percent-format --py37-plus
+
+There is .pre-commit-config.yaml to use pre-commit to automatically run black,
+isort and pyupgrade before commits. (execute `pre-commit install` to install
+the git hook.)
diff --git a/tox.ini b/tox.ini
index 724105b..505d6bc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,16 @@
 
 [tox]
 toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/bijoe/{env:BRANCH_NAME:}
-envlist = py3-dj22
+envlist =
+	py3-dj22
+	code-style
+
+[testenv:code-style]
+skip_install = true
+deps =
+	pre-commit
+commands =
+	pre-commit run --all-files --show-diff-on-failure
 
 [testenv]
 usedevelop = true
@@ -31,6 +40,7 @@ deps =
 	dj22: https://git.entrouvert.org/hobo.git/snapshot/hobo-main.tar.gz
 commands =
         py3-dj22: py.test {posargs: --junitxml=test_{envname}_results.xml --cov-report xml --cov-report html --cov=bijoe tests/}
+
 [pytest]
 filterwarnings =
  once:.*