--- pyproject.toml.orig	2023-09-13 20:09:22 UTC
+++ pyproject.toml
@@ -2,7 +2,7 @@
 requires = [
     # Also declared in requirements.txt, if updating here please also update
     # there
-    "Cython~=3.0.0",
+    "Cython~=0.29.30",
     "setuptools >= 35.0.2",
 ]
 build-backend = "setuptools.build_meta"