diff --git a/.ci_support/environment-lammps.yml b/.ci_support/environment-lammps.yml
index 5da41f9f..cc2974d1 100644
--- a/.ci_support/environment-lammps.yml
+++ b/.ci_support/environment-lammps.yml
@@ -1,7 +1,7 @@
 channels:
 - conda-forge
 dependencies:
-- lammps =2024.06.27
+- lammps =2024.06.27=*mpich*
 - pandas =2.2.2
 - pylammpsmpi =0.2.23
 - jinja2 =3.1.4