diff --git a/pyproject.toml b/pyproject.toml
index 62de486..c87a09a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ my-mcp-server = "my_mcp_server.server:main"
 [project.optional-dependencies]
 # Major-bounded so a breaking ruff/mypy/pytest release can't turn CI red overnight.
 dev = [
-    "pytest>=9.0.3,<10",
+    "pytest>=9.1.0,<10",
     "pytest-asyncio>=1.4.0,<2",
     "pytest-cov>=7.1.0,<8",
     "ruff>=0.15.14,<1",