diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 11cdd42..79ae836 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -11,7 +11,7 @@ ci:
 
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: "v5.0.0"
+  rev: "v6.0.0"
   hooks:
   - id: check-added-large-files
   - id: check-case-conflict
@@ -26,20 +26,20 @@ repos:
   - id: requirements-txt-fixer
   - id: trailing-whitespace
 
-- repo: https://github.com/psf/black
-  rev: "24.10.0"
+- repo: https://github.com/psf/black-pre-commit-mirror
+  rev: "26.5.1"
   hooks:
   - id: black
     additional_dependencies: [tomli]
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.8.3
+  rev: v0.15.15
   hooks:
     - id: ruff
       args: [--fix, --exit-non-zero-on-fix]
 
 - repo: https://github.com/pre-commit/mirrors-clang-format
-  rev: v19.1.5
+  rev: v22.1.5
   hooks:
   - id: clang-format
     types_or: [c, c++]
@@ -50,14 +50,14 @@ repos:
   - id: cmake-format
 
 - repo: https://github.com/codespell-project/codespell
-  rev: v2.3.0
+  rev: v2.4.2
   hooks:
   - id: codespell
     args: [-w]
     additional_dependencies: [tomli]
 
 - repo: https://github.com/keewis/blackdoc
-  rev: v0.3.9
+  rev: v0.4.6
   hooks:
   - id: blackdoc
     additional_dependencies: [tomli]
diff --git a/README.md b/README.md
index ffb70b3..23dbc57 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ import numpy as np
 
 # tetrahedralize unit cube
 # define points
-points=[
+points = [
     [0.0, 0.0, 0.0],
     [1.0, 0.0, 0.0],
     [0.0, 1.0, 0.0],