diff --git a/pyproject.toml b/pyproject.toml
index 71a436d..88a4adf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,10 +48,10 @@ dev-flake8 = [
   "pydoclint == 0.8.3",
   "pydocstyle == 6.3.0",
 ]
-dev-formatting = ["black == 25.9.0", "isort == 8.0.1"]
+dev-formatting = ["black == 26.3.1", "isort == 8.0.1"]
 dev-mkdocs = [
   "Markdown == 3.10.2",
-  "black == 25.9.0",
+  "black == 26.3.1",
   "mike == 2.1.3",
   "mkdocs-gen-files == 0.6.0",
   "mkdocs-literate-nav == 0.6.2",