diff --git a/README.md b/README.md
index 1fad2f658b3f5b33f2f08c3dfc26b59419c5153d..0ce825f69885766b75eec73625a6033e2a9e1bf2 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="500" height="300">
+  <img src="./vignettes/figs/simulation_step.png" width="400" height="200">
 </div>