diff --git a/pyproject.toml b/pyproject.toml
index 263bde3..8d4c56e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@
 
 [build-system]
 requires = [
-    "Cython < 4, >= 0.29",
+    "Cython >= 3.2.4, < 4",
     "setuptools >= 61",
 ]
 build-backend = "setuptools.build_meta"
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 2107597..d6fd69d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,6 +1,6 @@
 build
 colorama == 0.4.*
-cython < 4, >= 0.29
+cython >= 3.2.4, < 4
 more_itertools == 10.*
 mypy
 setuptools >= 61