diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index 355d2f2..a850622 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -5,7 +5,7 @@ dependencies:
   - lammps =2023.08.02
   - mpich
   - numpy =1.26.0
-  - mpi4py =3.1.4
+  - mpi4py =3.1.5
   - pympipool =0.7.1
   - ase =3.22.1
   - scipy =1.11.3
diff --git a/.ci_support/environment-openmpi.yml b/.ci_support/environment-openmpi.yml
index ff22423..ccf6793 100644
--- a/.ci_support/environment-openmpi.yml
+++ b/.ci_support/environment-openmpi.yml
@@ -5,7 +5,7 @@ dependencies:
   - lammps =2023.08.02
   - openmpi
   - numpy =1.26.0
-  - mpi4py =3.1.4
+  - mpi4py =3.1.5
   - pympipool =0.7.1
   - ase =3.22.1
   - scipy =1.11.3
diff --git a/setup.py b/setup.py
index ba97d92..bd3af47 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
     keywords='lammps, mpi4py',
     packages=find_packages(exclude=["*tests*"]),
     install_requires=[
-        "mpi4py==3.1.4", "pympipool==0.7.1", "numpy==1.26.0"
+        "mpi4py==3.1.5", "pympipool==0.7.1", "numpy==1.26.0"
     ],
     extras_require={
         "ase": ["ase==3.22.1", "scipy==1.11.3"],