diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d5dd70d4..0f0181a1 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -8,6 +8,12 @@ repos:
           - id: end-of-file-fixer
           - id: check-yaml
           - id: check-added-large-files
+    # black for auto-formatting
+    - repo: https://github.com/psf/black
+      rev: 21.12b0
+      hooks:
+          - id: black
+            language_version: python3.10
     # same as lint.yml
     # - repo: https://github.com/pycqa/pylint
     #   rev: v3.3.1