diff --git a/README.md b/README.md
index 05c0eb6..26c5c04 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ![Logo](https://github.com/McGillMedPhys/clustered_dna_damage/blob/dev/repository_logo_figure.svg)
 
-This repository contains a TOPAS-nBio application that can be used to simulate clustered DNA damage due to direct and indirect radiation action.
+This repository contains a TOPAS-nBio application that can be used to simulate clustered DNA damage due to direct and indirect action of ionizing radiation.
 
 v1: [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.5090104.svg)](https://doi.org/10.5281/zenodo.5090104)