diff --git a/CHANGES.rst b/CHANGES.rst
index cdd2071..a15e1c7 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -14,7 +14,10 @@ New features:
 
 Bug fixes:
 
-- *add item here*
+- Black code style:
+
+  - Format code with black (pure defaults).
+  - Add pre-commit-hook.
 
 
 0.3.9 (2019-03-02)
diff --git a/buildout.cfg b/buildout.cfg
index f4269b1..021a662 100644
--- a/buildout.cfg
+++ b/buildout.cfg
@@ -2,11 +2,21 @@
 develop = .
 parts = devpython test
 
+[buildout:python3]
+parts +=
+    pre-commit
+
 [devpython]
 recipe = zc.recipe.egg
 interpreter = devpython
 eggs = z3c.autoinclude[test]
 
+[pre-commit:python3]
+recipe = plone.recipe.command
+command =
+    pip install pre-commit
+    pre-commit install
+
 [test]
 recipe = zc.recipe.testrunner
 eggs = z3c.autoinclude[test]