diff --git a/python/lammps/core.py b/python/lammps/core.py
index f06942cc64..2fd5452c35 100644
--- a/python/lammps/core.py
+++ b/python/lammps/core.py
@@ -334,8 +334,8 @@ class lammps(object):
     if self.has_mpi_support:
       try:
         from mpi4py import __version__ as mpi4py_version
-        # tested to work with mpi4py versions 2 and 3
-        self.has_mpi4py = mpi4py_version.split('.')[0] in ['2','3']
+        # tested to work with mpi4py versions 2, 3, and 4
+        self.has_mpi4py = mpi4py_version.split('.')[0] in ['2','3','4']
       except ImportError:
         # ignore failing import
         pass
@@ -361,7 +361,7 @@ class lammps(object):
         if not self.has_mpi_support:
           raise Exception('LAMMPS not compiled with real MPI library')
         if not self.has_mpi4py:
-          raise Exception('Python mpi4py version is not 2 or 3')
+          raise Exception('Python mpi4py version is not 2, 3, or 4')
         if self.MPI._sizeof(self.MPI.Comm) == sizeof(c_int):
           MPI_Comm = c_int
         else: