diff --git a/pyproject.toml b/pyproject.toml
index ec6131b..8727468 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [build-system]
 build-backend = "poetry.core.masonry.api"
 requires = [
-  "poetry-core<2,>=1",
+  "poetry-core>=1,<2",
 ]
 
 [tool.poetry]