diff --git a/pyproject.toml b/pyproject.toml
index 5f1cfbe..a4b3396 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ include = [
 ]
 
 [tool.poetry.dependencies]
-python = ">=3.10"
+python = ">=3.10,<4.0"
 
 [tool.poetry.dev-dependencies]
 black = "*"