diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index 183d05a..3a76410 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -4,7 +4,7 @@ dependencies:
   - coveralls
   - coverage
   - codacy-coverage
-  - lammps =2023.03.28
+  - lammps =2023.08.02
   - mpich
   - numpy =1.26.0
   - mpi4py =3.1.4