diff --git a/.pre-commit-hooks.yaml b/.pre-commit-hooks.yaml
index ef8015e..07cf0bf 100644
--- a/.pre-commit-hooks.yaml
+++ b/.pre-commit-hooks.yaml
@@ -4,3 +4,4 @@
     entry: flake8
     language: python
     types: [python]
+    require_serial: true