diff --git a/docs/Scientific_Computing/Supported_Applications/GROMACS.md b/docs/Scientific_Computing/Supported_Applications/GROMACS.md
index 7c885ca31..e4ab06059 100644
--- a/docs/Scientific_Computing/Supported_Applications/GROMACS.md
+++ b/docs/Scientific_Computing/Supported_Applications/GROMACS.md
@@ -121,7 +121,7 @@ ie: with `--ntasks` > 1.
 
 GROMACS is built with CUDA support, but that is optional to use - it will run without a GPU.
 
-### MPI
+## MPI
 
 If you do elect to use `gmx-mpi`, note that hybrid parallelisation (i.e. with `--cpus-per-task` > `1`) can be
 more efficient than MPI-only parallelisation.  With hybrid parallelisation, it is important to run