diff --git a/pyproject.toml b/pyproject.toml
index 8e82192..d917d24 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [build-system]
-# Fix Maturin to 1.5. 1.6 introduced a regression which prevents the wheel from building under os-x
-# and windows. It does not find the cffi module.
-requires = ["cffi", "maturin>=1.0,<1.5"]
+# 1.6 introduced a regression which prevents the wheel from building under os-x and windows. So we
+# need at least 1.7.
+requires = ["cffi", "maturin>=1.7,<2.0"]
 build-backend = "maturin"
 
 [project]