diff --git a/pyproject.toml b/pyproject.toml
index 7e97dd8..e6312d1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ requires = [
     "setuptools >=64",
     "setuptools-git-versioning",
     "wheel",
-    "cffi>=1.11,<1.16",
+    "cffi>=1.11",
     "cython",
     "oldest-supported-numpy; platform_python_implementation != 'PyPy'",
     # Inspired by SciPy: unpin numpy version for PyPy builds,