diff --git a/pyproject.toml b/pyproject.toml
index 3fe95ed3..b46b4a36 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,7 +56,7 @@ optional-dependencies.dev = [
     "pyproject-fmt==2.11.1",
     "pyright==1.1.407",
     "pyroma==5.0",
-    "pytest==8.4.2",
+    "pytest==9.0.0",
     "pytest-cov==7.0.0",
     "pyyaml==6.0.3",
     "ruff==0.14.4",