diff --git a/pyproject.toml b/pyproject.toml
index 6d55f05..3b43a86 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ pytest-mypy = ">=1.0.1"
 mypy = ">=1.19.1"
 
 [build-system]
-requires = ["poetry_core>=1.0.0"]
+requires = ["poetry_core>=1.9.1"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.black]