diff --git a/pyproject.toml b/pyproject.toml
index 90ae77e3..65b3a242 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -93,7 +93,7 @@ mypy-protobuf = "^3.0.0"
 
 
 [tool.poetry.group.test.dependencies]
-pytest = "^8.1.1"
+pytest = ">=8.1.1,<10.0.0"
 
 [tool.poetry.group.dev.dependencies]
 black = "*"