diff --git a/pyproject.toml b/pyproject.toml
index 76a771d..3b9e5b4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,10 +44,10 @@ dev-flake8 = [
   "pydoclint == 0.7.6",
   "pydocstyle == 6.3.0",
 ]
-dev-formatting = ["black == 25.9.0", "isort == 7.0.0"]
+dev-formatting = ["black == 26.3.1", "isort == 7.0.0"]
 dev-mkdocs = [
   "Markdown == 3.9",
-  "black == 25.9.0",
+  "black == 26.3.1",
   "mike == 2.1.3",
   "mkdocs-gen-files == 0.5.0",
   "mkdocs-literate-nav == 0.6.3",