diff --git a/pyproject.toml b/pyproject.toml
index 69f46ede..2b7db9c3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ packages = ["alignment"]
 dev = [
     "ruff",
     "mypy>=1.0,<1.17",
-    "black>=23.1,<24.0",
+    "black>=23.1,<26.0",
     "isort>=5.12,<6.1",
     "pytest",
     "pytest-sphinx",