diff --git a/pyproject.toml b/pyproject.toml
index d2beb7f..afe2a99 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,5 +39,5 @@ repository = "https://github.com/RedisLabsModules/RLTest"
 RLTest = 'RLTest.__main__:main'
 
 [build-system]
-requires = ["poetry-core>=1.0.0"]
+requires = ["poetry-core>=1.0.0,<2.0.0"]
 build-backend = "poetry.core.masonry.api"