diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index 2875f21..7d1897b 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -3,7 +3,7 @@ channels:
 dependencies:
 - coverage
 - lammps =2024.06.27=*_mpi_mpich_*
-- mpich =4.2.2
+- mpich =4.2.3
 - numpy =1.26.4
 - mpi4py =4.0.0
 - executorlib =0.0.3