diff --git a/scripts/install b/scripts/install
index 5fc49f9..ee20d52 100644
--- a/scripts/install
+++ b/scripts/install
@@ -16,6 +16,7 @@ source /usr/share/yunohost/helpers
 
 ynh_clean_setup () {
 	### Remove this function if there's nothing to clean before calling the remove script.
+	read -p "Press any key..."
 	ynh_clean_check_starting
 }
 # Exit if an error occurs during the execution of the script
@@ -97,12 +98,9 @@ ynh_app_setting_set $app port $port
 ###		- As well as the section "REINSTALL DEPENDENCIES" in the restore script
 ###		- And the section "UPGRADE DEPENDENCIES" in the upgrade script
 
-curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
-echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
-
 ynh_install_nodejs 10
 
-ynh_install_app_dependencies redis-server postgresql postgresql-contrib yarn
+ynh_install_app_dependencies redis-server postgresql postgresql-contrib
 
 #=================================================
 # CREATE A POSTGRESQL DATABASE
@@ -192,7 +190,7 @@ chown -R "$app":"$app" "$final_path"
 
 pushd $final_path
     ynh_use_nodejs
-    sudo -u $app env PATH=$PATH:$nodejs_path yarn install
+    sudo -u $app env PATH=$PATH:$nodejs_path npm install
     sudo -u $app env PATH=$PATH:$nodejs_path npm run build
 popd
 
diff --git a/scripts/remove b/scripts/remove
index d49e468..9f2ab84 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -57,7 +57,6 @@ ynh_psql_remove_db "$db_name" "$db_name"
 ynh_remove_app_dependencies
 ynh_use_nodejs
 ynh_remove_nodejs
-rm -rf "/etc/apt/sources.list.d/yarn.list"
 
 #=================================================
 # REMOVE APP MAIN DIR
diff --git a/scripts/restore b/scripts/restore
index a4bec38..0d0c4d8 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -92,12 +92,10 @@ chown -R "$app":"$app" "$final_path"
 #=================================================
 
 # Define and install dependencies
-curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
-echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
 
 ynh_install_nodejs 10
 
-ynh_install_app_dependencies redis-server postgresql postgresql-contrib yarn
+ynh_install_app_dependencies redis-server postgresql postgresql-contrib
 
 #=================================================
 # RESTORE SYSTEMD
diff --git a/scripts/upgrade b/scripts/upgrade
index 4efb517..42da3b5 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -102,12 +102,9 @@ ynh_add_nginx_config
 # UPGRADE DEPENDENCIES
 #=================================================
 
-curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
-echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
-
 ynh_install_nodejs 10
 
-ynh_install_app_dependencies redis-server postgresql postgresql-contrib yarn
+ynh_install_app_dependencies redis-server postgresql postgresql-contrib
 
 #=================================================
 # CREATE DEDICATED USER
@@ -133,7 +130,7 @@ chown -R "$app":"$app" "$final_path"
 
 pushd $final_path
     ynh_use_nodejs
-    sudo -u $app env PATH=$PATH:$nodejs_path yarn install
+    sudo -u $app env PATH=$PATH:$nodejs_path npm install
     sudo -u $app env PATH=$PATH:$nodejs_path npm run build
 popd