diff --git a/pyproject.toml b/pyproject.toml
index d08a03f27..bc23836b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,7 @@ requires = ["setuptools",
             "setuptools_scm",
             "extension-helpers==1.*",
             "numpy>=2.0.0rc1",
-            "cython==3.1.0a1"]
+            "cython @ git+https://github.com/da-woods/cython@cpython-library-limited-api"]
 build-backend = 'setuptools.build_meta'
 
 [tool.setuptools]