diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index 23b1851..7765097 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -1,11 +1,11 @@
 channels:
-  - conda-forge
+- conda-forge
 dependencies:
-  - coverage
-  - lammps =2023.11.21
-  - mpich
-  - numpy =1.26.4
-  - mpi4py =3.1.5
-  - pympipool =0.7.17
-  - ase =3.22.1
-  - scipy =1.12.0
+- coverage
+- lammps =2023.11.21
+- mpich
+- numpy =1.26.4
+- mpi4py =3.1.5
+- pympipool =0.7.17
+- ase =3.22.1
+- scipy =1.12.0