diff --git a/python/pyproject.toml b/python/pyproject.toml
index 9a2aededc0..d0283c6466 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -22,7 +22,7 @@ authors = [
 ]
 dependencies = [
       "numpy>=2",
-      "cffi<2.1",
+      "cffi<2.2",
       "mpi4py",
       "fenics-basix>=0.12.0.dev0",
       "fenics-ffcx>=0.12.0.dev0",