diff --git a/setup.py b/setup.py
index 7f02c491..9331b686 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,7 @@
     packages=find_packages(exclude=["*tests*", "*.ci_support*"]),
     install_requires=[
         'cloudpickle==2.2.1',
-        'mpi4py==3.1.4',
+        'mpi4py==3.1.5',
         'tqdm==4.66.1',
         'pyzmq==24.0.1',
     ],