diff --git a/pyproject.toml b/pyproject.toml
index 47f30c10..3dbde167 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ all = [
     "pyearthtools-zoo>=0.6.1",
 ]
 test = ["pytest", "pytest-cov", "pytest-xdist"]
-dev = ["pre-commit", "black==25.1.0", "ruff", "pudb"]
+dev = ["pre-commit", "black==26.3.1", "ruff", "pudb"]
 docs = [
     "sphinx",
     "myst-parser",