diff --git a/README.md b/README.md
index 5b17c261664fde8fa35dbf45fd8aa8542a96849a..fb06fcfa5dc12699b4ff4ef335beef0bb402b672 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@ In any case, if you use this workflow in a paper, don't forget to give credits t
 
 Configure the workflow according to your needs via editing the `config.yaml`, `design.txt` and `multiqc_config.yaml` files in the `config/` directory.
 
-You can also copy the singularity image in the cloned ChIPflow directory and rename it as "chipflow.img".
+You need to copy the singularity image in the cloned ChIPflow directory and rename it as "chipflow.img".
 
 *  Step 3: Execute workflow