diff --git a/.github/workflows/build_docs.yml b/.github/workflows/build_docs.yml
index 16d92b3..3a9b84f 100644
--- a/.github/workflows/build_docs.yml
+++ b/.github/workflows/build_docs.yml
@@ -20,7 +20,7 @@
      strategy:
        matrix:
          os: ['ubuntu-latest']
-         environment-file: [ci/312.yaml]
+         environment-file: [ci/312-latest.yaml]
          experimental: [false]
      defaults:
        run:
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 6c29e65..0507610 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -25,16 +25,16 @@
        matrix:
          os: [ubuntu-latest]
          environment-file:
-           - ci/310-MIN.yaml
-           - ci/311.yaml
-           - ci/312.yaml
-           - ci/312-DEV.yaml
+           - ci/310-oldest.yaml
+           - ci/311-latest.yaml
+           - ci/312-latest.yaml
+           - ci/312-dev.yaml
          include:
-           - environment-file: ci/312.yaml
+           - environment-file: ci/312-latest.yaml
              os: macos-13 # Intel
-           - environment-file: ci/312.yaml
+           - environment-file: ci/312-latest.yaml
              os: macos-14 # Apple Silicon
-           - environment-file: ci/312.yaml
+           - environment-file: ci/312-latest.yaml
              os: windows-latest
        fail-fast: false
 
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f4cd8ad..d16e920 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,14 +1,10 @@
 files: "inequality\/"
 repos:
-  - repo: https://github.com/psf/black
-    rev: "24.4.2"
-    hooks:
-      - id: black
-        language_version: python3
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: "v0.5.0"
+    rev: "v0.6.1"
     hooks:
       - id: ruff
+      - id: ruff-format
 
 ci:
   autofix_prs: false
diff --git a/ci/310-MIN.yaml b/ci/310-oldest.yaml
similarity index 100%
rename from ci/310-MIN.yaml
rename to ci/310-oldest.yaml
diff --git a/ci/311.yaml b/ci/311-latest.yaml
similarity index 100%
rename from ci/311.yaml
rename to ci/311-latest.yaml
diff --git a/ci/312-DEV.yaml b/ci/312-dev.yaml
similarity index 100%
rename from ci/312-DEV.yaml
rename to ci/312-dev.yaml
diff --git a/ci/312.yaml b/ci/312-latest.yaml
similarity index 100%
rename from ci/312.yaml
rename to ci/312-latest.yaml
diff --git a/inequality/theil.py b/inequality/theil.py
index 458c6d9..7d9b629 100644
--- a/inequality/theil.py
+++ b/inequality/theil.py
@@ -1,6 +1,4 @@
-"""Theil Inequality metrics
-
-"""
+"""Theil Inequality metrics"""
 
 __author__ = "Sergio J. Rey <srey@asu.edu> "
 
diff --git a/pyproject.toml b/pyproject.toml
index 60b946b..4a4aff7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,6 @@ Repository = "https://github.com/pysal/inequality"
 
 [project.optional-dependencies]
 dev = [
-    "black",
     "pre-commit",
     "ruff",
 ]
@@ -62,12 +61,9 @@ pen = [
 [tool.setuptools.packages.find]
 include = ["inequality", "inequality.*"]
 
-[tool.black]
-line-length = 88
 
 [tool.ruff]
 line-length = 88
-target-version = "py310"
 
 [tool.ruff.lint]
 select = ["E", "F", "W", "I", "UP", "N", "B", "A", "C4", "SIM", "ARG"]