diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index 43613b1..2e65587 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -4,8 +4,8 @@ dependencies:
   - coveralls
   - coverage
   - codacy-coverage
-  - lammps  >=2020.12.24
-  - mpi4py
+  - lammps >=2020.12.24
+  - mpi4py >=3.0.3
   - openmpi
   - numpy
   - distributed 
diff --git a/setup.py b/setup.py
index ae11c66..79ee44a 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
     keywords='lammps, mpi4py',
     packages=find_packages(exclude=["*tests*"]),
     install_requires=[
-        'mpi4py==3.0.2'
+        'mpi4py==3.0.3'
     ],
     cmdclass=versioneer.get_cmdclass(),
 )