diff --git a/pyproject.toml b/pyproject.toml
index 2732be22fa..4b8a1db70e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ maintainers = [
 ]
 dependencies = [
   "cachetools",
-  "decorator",
+  "decorator<=4.4.2",
   "mpi4py",
   "h5py",
   "petsc4py",