diff --git a/client/pyproject.toml b/client/pyproject.toml
index 705782e1..d135293d 100644
--- a/client/pyproject.toml
+++ b/client/pyproject.toml
@@ -34,7 +34,7 @@ certgrinder = "certgrinder.certgrinder:main"
 
 [project.optional-dependencies]
 dev = ["twine == 6.1.0", "pre-commit == 4.2.0", "setuptools-scm == 8.3.1", "build==1.2.2.post1"]
-test = ["pytest == 8.3.5", "pytest-cov==6.1.1", "tox == 4.26.0"]
+test = ["pytest == 9.0.0", "pytest-cov==6.1.1", "tox == 4.26.0"]
 docs = ["Sphinx==8.2.3", "sphinx-rtd-theme==3.0.2", "sphinx-argparse==0.4.0"]
 
 [project.urls]