diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 44ad87cdf..0d0b6c402 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -18,6 +18,7 @@ repos:
     hooks:
       - id: black
         language_version: python3.8
+        args: ["--line-length", "100"]
 
   - repo: https://github.com/pycqa/isort
     rev: 5.12.0
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 000000000..aa4949aa1
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,2 @@
+[tool.black]
+line-length = 100