diff --git a/pyproject.toml b/pyproject.toml
index aa4949aa1..8075794dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,2 +1,3 @@
 [tool.black]
 line-length = 100
+target-version = ['py37', 'py38']
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 0a9135d90..0defb5eab 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,4 +5,4 @@ pytest-cov>=2.6.1
 seaborn>=0.9.0
 sphinx>=1.8
 nbsphinx>=0.4.2
-black; python_version == '3.7'
+black==19.10b0
diff --git a/scripts/lint.sh b/scripts/lint.sh
index 08d1141f4..c360c7981 100755
--- a/scripts/lint.sh
+++ b/scripts/lint.sh
@@ -2,7 +2,7 @@
 set -ex # fail on first error, print commands
 
 echo "Checking code style with black...."
-python -m black bambi --line-length=100  --target-version=py37 --exclude=tests/ --check
+python -m black bambi --check
 echo "Success!"
 
 echo "Checking code style with pylint..."