diff --git a/README.md b/README.md
index a8139bcfa..c7b76a9ee 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,7 @@ Optionally:
   + With `setuptools`, `wheel`, `build` and optionally `venv` python packages installed
 + [swig](http://www.swig.org/) `>= 4.0.2` for python integration
   + Swig `4.x` will be automatically downloaded by CMake if not provided (if possible).
++ MPI (e.g. [MPICH](https://www.mpich.org/), [OpenMPI](https://www.open-mpi.org/)) for distributed ensemble support
 + [FLAMEGPU2-visualiser](https://github.com/FLAMEGPU/FLAMEGPU2-visualiser) dependencies
   + [SDL](https://www.libsdl.org/)
   + [GLM](http://glm.g-truc.net/) *(consistent C++/GLSL vector maths functionality)*