diff --git a/.pre-commit-hooks.yaml b/.pre-commit-hooks.yaml
index 0d43112..c8a8ff0 100644
--- a/.pre-commit-hooks.yaml
+++ b/.pre-commit-hooks.yaml
@@ -4,4 +4,5 @@
     entry: black
     language: python
     language_version: python3
+    require_serial: true
     types: [python]