diff --git a/requirements.txt b/requirements.txt
index c58f89e..d7c0d07 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ qiskit-ibm-runtime>=0.20
 pyscf>=2.4
 
 # HPC / parallel
-mpi4py>=3.1
+mpi4py>=4.1.2
 numpy>=1.24
 scipy>=1.10