diff --git a/pyproject.toml b/pyproject.toml
index 8134f73f1..c063a9b0e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ classifiers = [
 repository = "https://github.com/tableau/server-client-python"
 
 [project.optional-dependencies]
-test = ["black==26.3.1", "build", "mypy==1.4", "pytest>=7.0", "pytest-cov", "pytest-subtests",
+test = ["black==26.5.1", "build", "mypy==1.4", "pytest>=7.0", "pytest-cov", "pytest-subtests",
     "pytest-xdist", "requests-mock>=1.0,<2.0", "types-requests>=2.32.4.20250913"]
 
 [tool.setuptools.package-data]