diff --git a/README.md b/README.md
index 0ce825f69885766b75eec73625a6033e2a9e1bf2..9cafffc103707aaf5afb1097d35d08c18d5d991e 100644
--- a/README.md
+++ b/README.md
@@ -107,7 +107,7 @@ The simulation process in HTRfit has been optimized to generate RNAseq counts fo
 
 
 <div id="bg"  align="center">
-  <img src="./vignettes/figs/simulation_step.png" width="400" height="200">
+  <img src="./vignettes/figs/simulation_step.png" width="500" height="200">
 </div>