diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7178039..62c7b5c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -10,10 +10,6 @@ repos:
     rev: 23.10.0
     hooks:
       - id: black
--   repo: https://github.com/PyCQA/isort
-    rev: 5.12.0
-    hooks:
-    -   id: isort
 -   repo: https://github.com/charliermarsh/ruff-pre-commit
     # Ruff version.
     rev: "v0.1.1"
diff --git a/README.md b/README.md
index e7546af..f0701c5 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit)](https://github.com/pre-commit/pre-commit)
+
 # Advent of Code
 
 Solutions to the problems proposed at https://adventofcode.com