diff --git a/MPI/pyproject.toml b/MPI/pyproject.toml
index 6b86a85f..48554d48 100644
--- a/MPI/pyproject.toml
+++ b/MPI/pyproject.toml
@@ -32,7 +32,7 @@ dependencies = [
     "numpy<1.25.0",
     "numba_mpi>=0.30",
     "PyMPDATA",
-    "mpi4py==4.0.3",
+    "mpi4py==4.1.1",
     "h5py",
 ]
 dynamic = ["version"]