diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index b020dd2c..311fa884 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -5,7 +5,7 @@ dependencies:
   - coverage
   - codacy-coverage
   - lammps >=2021.05.27
-  - mpi4py =3.0.3
+  - mpi4py =3.1.1
   - openmpi
   - numpy
   - distributed 
diff --git a/setup.py b/setup.py
index 19705b49..158726c2 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
     keywords='lammps, mpi4py',
     packages=find_packages(exclude=["*tests*"]),
     install_requires=[
-        'mpi4py==3.0.3'
+        'mpi4py==3.1.1'
     ],
     cmdclass=versioneer.get_cmdclass(),
 )