diff --git a/README.md b/README.md
index fee30f96a44922b5dc046ded95a1308c7f01c2d6..79768a9526b3ae0d160d544d612f0c99587d2196 100755
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ git clone https://gitlab.pasteur.fr/BEBP/diphtoscan.git
 
 **C.** Give the execute permission to the file `diphtOscan/__main__.py`:
 ```bash
-chmod +x __main__.py
+chmod diphtOscan/+x __main__.py
 ```
 
 **D.** Execute _diphtOscan_ with the following command line model: