diff --git a/pyproject.toml b/pyproject.toml
index 4d2c7b1b..11718ef6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,7 +49,7 @@ pydantic-extra-types = "^2.10.5"
 
 [tool.poetry.group.dev.dependencies]
 mypy = {version = "^1.9.0", markers = "platform_python_implementation == 'CPython'"}
-pytest = "^8.0.2"
+pytest = ">=8.0.2,<10.0.0"
 ipdb = "^0.13.9"
 black = ">=24.2,<26.0"
 isort = ">=5.9.3,<8.0.0"