From 0c2eaa33d2930baa1206bac148057acd767d592e Mon Sep 17 00:00:00 2001
From: Gerard <gerard@verdnatura.es>
Date: Wed, 18 Apr 2018 14:39:44 +0200
Subject: [PATCH] fix wrong command

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 9911d47b47..834cac070c 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ $ npm install -g karma-cli gulp webpack nodemon
 
 Your user must be on the docker group to use it so you will need to run this command:
 ```
-$ sudo usermod -G docker yourusername
+$ sudo usermod -a -G docker yourusername
 ```
 
 ## Getting Started // Installing