diff --git a/py/pyproject.toml b/py/pyproject.toml
index b3b3464a..0a558d10 100644
--- a/py/pyproject.toml
+++ b/py/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["maturin>=0.14,<0.15"]
+requires = ["maturin>=0.14,<1.9"]
 build-backend = "substrait_validator_build"
 backend-path = ["."]