diff --git a/pyproject.toml b/pyproject.toml
index daf0a9b..b1b89b6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ include = ["cometapi_helper*"]
 testpaths = ["tests"]
 
 [project.optional-dependencies]
-dev = ["pytest>=8,<9", "ruff==0.16.8"]
+dev = ["pytest>=8,<10", "ruff==0.16.8"]
 
 [tool.ruff]
 target-version = "py39"