diff --git a/HowtoNodeJS.md b/HowtoNodeJS.md
index c871a5df..1068ffb1 100644
--- a/HowtoNodeJS.md
+++ b/HowtoNodeJS.md
@@ -15,8 +15,7 @@ Nous préconisons l'installation des paquets Debian distribués par NodeSource (
 ~~~
 # echo "deb http://deb.nodesource.com/node_8.x stretch main" >> /etc/apt/sources.list.d/nodesource.list
 # wget https://deb.nodesource.com/gpgkey/nodesource.gpg.key -O - | apt-key add -
-# apt update
-# apt install nodejs
+# apt update && apt install nodejs
 
 $ nodejs -v
 v8.9.4
@@ -90,8 +89,8 @@ Installation par NPM :
 Installation via un paquet Debian :
 
 ~~~
+# echo "deb http://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list
 # wget -qO - https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
-# echo "deb https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list
 # apt update && apt install yarn
 ~~~