diff --git a/pyproject.toml b/pyproject.toml
index ee0b3bf..c6441d6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "pytest>=8.4.0",
+    "pytest>=9.1.1",
     "pytest-mock>=3.15.1",
     "ruff>=0.15.17",
     "mypy>=2.1.0",