diff --git a/scripts/backup b/scripts/backup
index b7ff222..8040747 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -32,8 +32,7 @@ ynh_backup "/etc/cron.d/${app}" "cron.conf"
 ynh_backup "/etc/systemd/system/mastodon-web.service" "systemd_web.service"
 ynh_backup "/etc/systemd/system/mastodon-sidekiq.service" "systemd_sidekiq.service"
 ynh_backup "/etc/systemd/system/mastodon-streaming.service" "systemd_streaming.service"
-debian_version=$(lsb_release -c -s)
-if [[ $debian_version =  jessie ]]; then
+if [ "$(lsb_release --codename --short)" == "jessie" ]; then
 	ynh_backup "/etc/apt/sources.list.d/backports.list" "apt_backports.list"
 fi
 ynh_backup "/etc/apt/sources.list.d/yarn.list" "apt_yarn.list"
diff --git a/scripts/install b/scripts/install
index d92e0ed..03f91bd 100644
--- a/scripts/install
+++ b/scripts/install
@@ -64,8 +64,7 @@ sudo curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
 sudo cp ../conf/yarn.list /etc/apt/sources.list.d/
 
 # Install source.list debian jessie package backports
-debian_version=$(lsb_release -c -s)
-if [[ $debian_version =  jessie ]]; then
+if [ "$(lsb_release --codename --short)" == "jessie" ]; then
 sudo cp ../conf/backports.list /etc/apt/sources.list.d/
 ynh_package_update
 sudo apt-get -t jessie-backports -y install ffmpeg
diff --git a/scripts/restore b/scripts/restore
index c6031de..1eb67e8 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -90,8 +90,7 @@ sudo adduser $app --home /opt/$app --gecos "First Last,RoomNumber,WorkPhone,Home
 	sudo cp ./apt_yarn.list /etc/apt/sources.list.d/yarn.list
 
 	# Install source.list debian jessie package backports
-	debian_version=$(lsb_release -c -s)
-	if [[ $debian_version =  jessie ]]; then
+	if [ "$(lsb_release --codename --short)" == "jessie" ]; then
 	sudo cp ./apt_backports.list /etc/apt/sources.list.d/backports.list
 	ynh_package_update
 	sudo apt-get -t jessie-backports -y install ffmpeg
diff --git a/scripts/upgrade b/scripts/upgrade
index ca0df71..63c3b75 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -83,7 +83,11 @@ sudo ln -s $final_path/.rbenv/versions/2.5.1/bin/ruby /usr/bin/ruby || true
 sudo su - $app <<MCOMMANDS
 pushd ~/live
 $final_path/.rbenv/versions/2.5.1/bin/gem install bundler
-$final_path/.rbenv/versions/2.5.1/bin/bundle install --deployment --without development test
+if [ "$(lsb_release --codename --short)" == "jessie" ]; then
+  $final_path/.rbenv/versions/2.5.1/bin/bundle install --deployment --without development test
+else
+  $final_path/.rbenv/versions/2.5.1/bin/bundle install --deployment --force --without development test
+fi
 MCOMMANDS
 
 # Install package with yarn and restart postgresql