diff --git a/scripts/_common.sh b/scripts/_common.sh
index 4a70d0b..904553d 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -5,8 +5,8 @@
 #=================================================
 
 # dependencies used by the app
-#pkg_dependencies="imagemagick ffmpeg libpq-dev libxml2-dev libxslt1-dev file git-core g++ libprotobuf-dev protobuf-compiler pkg-config gcc autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm5 libgdbm-dev nginx redis-server redis-tools postgresql postgresql-contrib certbot yarn libidn11-dev libicu-dev libjemalloc-dev"
-pkg_dependencies="imagemagick libpq-dev libxml2-dev libxslt1-dev file curl apt-transport-https pkg-config libprotobuf-dev protobuf-compiler libicu-dev libidn11-dev redis-server redis-tools postgresql autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm3 libgdbm-dev ffmpeg yarn"
+#pkg_dependencies="imagemagick ffmpeg libpq-dev libxml2-dev libxslt1-dev file git-core g++ libprotobuf-dev protobuf-compiler pkg-config nodejs gcc autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm5 libgdbm-dev nginx redis-server redis-tools postgresql postgresql-contrib certbot python-certbot-nginx yarn libidn11-dev libicu-dev libjemalloc-dev"
+ pkg_dependencies="imagemagick ffmpeg libpq-dev libxml2-dev libxslt1-dev file git-core g++ libprotobuf-dev protobuf-compiler pkg-config        gcc autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm3 libgdbm-dev       redis-server redis-tools postgresql postgresql-contrib                                   libidn11-dev libicu-dev libjemalloc-dev curl apt-transport-https"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/install b/scripts/install
index ff03433..2742e1d 100644
--- a/scripts/install
+++ b/scripts/install
@@ -88,24 +88,9 @@ ynh_app_setting_set --app=$app --key=port_stream --value=$port_stream
 #=================================================
 ynh_script_progression --message="Installing dependencies..." --weight=86
 
-# Import debian archive pubkey, need on ARM arch
-arch=$(uname -m)
-if [[ "$arch" = arm*  ]]; then
-	apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8B48AD6246925553
-	apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 7638D0442B90D010
-fi
-
-# Install extra_repo debian package backports & yarn
-if [ "$(lsb_release --codename --short)" == "jessie" ]; then
-	ynh_install_extra_repo --repo="deb http://httpredir.debian.org/debian jessie-backports main" --append
-fi
-
-ynh_install_extra_repo --repo="deb https://dl.yarnpkg.com/debian/ stable main" --key="https://dl.yarnpkg.com/debian/pubkey.gpg" --append
-
-# install nodejs
 ynh_install_nodejs --nodejs_version="8"
-
 ynh_install_app_dependencies $pkg_dependencies	
+ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
 #=================================================
 # CREATE A POSTGRESQL DATABASE
diff --git a/scripts/restore b/scripts/restore
index e85815c..b26661f 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -85,23 +85,9 @@ chown -R $app: $final_path
 #=================================================
 ynh_script_progression --message="Reinstalling dependencies..." --weight=63
 
-# Import debian archive pubkey, need on ARM arch
-arch=$(uname -m)
-if [[ "$arch" = arm*  ]]; then
-	apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8B48AD6246925553
-	apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 7638D0442B90D010
-fi
-
-# Install extra_repo debian package backports & yarn
-if [ "$(lsb_release --codename --short)" == "jessie" ]; then
-	ynh_install_extra_repo --repo="deb http://httpredir.debian.org/debian jessie-backports main" --append
-fi
-ynh_install_extra_repo --repo="deb https://dl.yarnpkg.com/debian/ stable main" --key="https://dl.yarnpkg.com/debian/pubkey.gpg" --append
-
-# install nodejs
 ynh_install_nodejs --nodejs_version="8"
-
-ynh_install_app_dependencies $pkg_dependencies
+ynh_install_app_dependencies $pkg_dependencies	
+ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
 #=================================================
 # INSTALLING RUBY AND BUNDLER
diff --git a/scripts/upgrade b/scripts/upgrade
index 7562d85..93cb3f0 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -104,6 +104,9 @@ if [[ -z "$vapid_private_key" ]]; then
 	ynh_app_setting_set "$app" vapid_public_key "$vapid_public_key"
 fi
 
+#Remove previous added repository
+ynh_remove_extra_repo
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
@@ -166,17 +169,9 @@ ynh_add_nginx_config 'port_web port_stream'
 #=================================================
 ynh_script_progression --message="Upgrading dependencies..." --weight=24
 
-# Install extra_repo debian package backports & yarn
-if [ "$(lsb_release --codename --short)" == "jessie" ]; then
-	ynh_install_extra_repo --repo="deb http://httpredir.debian.org/debian jessie-backports main" --append
-fi
-ynh_install_extra_repo --repo="deb https://dl.yarnpkg.com/debian/ stable main" --key="https://dl.yarnpkg.com/debian/pubkey.gpg" --append
-
-# Install nodejs
 ynh_install_nodejs --nodejs_version="8"
-
-# TODO: use the same mecanism with other files
-ynh_install_app_dependencies $pkg_dependencies
+ynh_install_app_dependencies $pkg_dependencies	
+ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
 #=================================================
 # CREATE DEDICATED USER