diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 0a1eae2..c5a1f31 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,14 +1,9 @@
 files: "giddy\/"
-repos:
-  - repo: https://github.com/psf/black
-    rev: "24.3.0"
-    hooks:
-      - id: black
-        language_version: python3
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: "v0.3.5"
+    rev: "v0.5.0"
     hooks:
       - id: ruff
+      - id: ruff-format
 
 ci:
   autofix_prs: false
diff --git a/giddy/directional.py b/giddy/directional.py
index ac34557..522a573 100644
--- a/giddy/directional.py
+++ b/giddy/directional.py
@@ -298,7 +298,7 @@ def permute(self, permutations=99, alternative="two.sided"):
             P = NEG * L + (1 - NEG) * S
             self.p = P
         else:
-            print("Bad option for alternative: %s." % alternative)
+            print(f"Bad option for alternative: {alternative}")
 
     def _calc(self, Y, w, k):
         wY = weights.lag_spatial(w, Y)
diff --git a/pyproject.toml b/pyproject.toml
index 0c126a9..841ed35 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,6 @@ Repository = "https://github.com/pysal/giddy"
 
 [project.optional-dependencies]
 dev = [
-    "black",
     "ruff",
     "pre-commit",
 ]
@@ -65,20 +64,12 @@ include = [
     "giddy.*",
 ]
 
-[tool.black]
-line-length = 88
-extend-exclude = '''
-(
-  docs/conf.py
-)
-#'''
-
 [tool.ruff]
 line-length = 88
-select = ["E", "F", "W", "I", "UP", "N", "B", "A", "C4", "SIM", "ARG"]
-target-version = "py39"
+lint.select = ["E", "F", "W", "I", "UP", "N", "B", "A", "C4", "SIM", "ARG"]
 exclude = ["giddy/tests/*", "docs/*"]
-[tool.ruff.per-file-ignores]
+
+[tool.ruff.lint.per-file-ignores]
 "__init__.py" = [
     "F401"      # imported but unused
 ]
@@ -97,6 +88,7 @@ exclude = ["giddy/tests/*", "docs/*"]
     "E501",     # Line too long
 ]
 
+
 [tool.coverage.run]
 source = ["./giddy"]