diff --git a/pyproject.toml b/pyproject.toml
index dd928632..39dc89db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -75,9 +75,9 @@ dev-flake8 = [
   "pydoclint == 0.8.3",
   "pydocstyle == 6.3.0",
 ]
-dev-formatting = ["black == 26.1.0", "isort == 8.0.1"]
+dev-formatting = ["black == 26.3.1", "isort == 8.0.1"]
 dev-mkdocs = [
-  "black == 26.1.0",
+  "black == 26.3.1",
   "Markdown == 3.10.2",
   "mike == 2.1.3",
   "mkdocs-gen-files == 0.6.0",
@@ -107,7 +107,7 @@ dev-pylint = [
 dev-pytest = [
   "pytest == 9.0.2",
   "pylint == 4.0.5", # We need this to check for the examples
-  "cookiecutter == 2.6.0", # For checking the cookiecutter scripts
+  "cookiecutter == 2.7.1", # For checking the cookiecutter scripts
   "jinja2 == 3.1.6", # For checking the cookiecutter scripts
   "sybil >= 6.1.1, < 10", # Should be consistent with the extra-lint-examples dependency
   # This is a hack to overcome an outdated version check in requests, see