diff --git a/cached_path/schemes/r2.py b/cached_path/schemes/r2.py
index c93ad19..f4dee5e 100644
--- a/cached_path/schemes/r2.py
+++ b/cached_path/schemes/r2.py
@@ -1,6 +1,7 @@
 """
 Cloudflare R2.
 """
+
 import io
 import os
 from typing import Optional
diff --git a/pyproject.toml b/pyproject.toml
index 9aa9b81..27a1532 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ dev = [
     "beaker-py>=1.13.2,<2.0",
     "ruff",
     "mypy>=1.6.0,<2.0",
-    "black>=23.1.0,<24.0",
+    "black>=23.1.0,<25.0",
     "isort>=5.12.0,<6.0",
     "pytest",
     "flaky",