diff --git a/pyproject.toml b/pyproject.toml
index 1574686..02f0f26 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ include = [
 ]
 
 [tool.poetry.dependencies]
-python = "^3.9"
+python = ">=3.9,<3.13"
 
 # CAD
 build123d = ">=0.5,<0.8"