diff --git a/scripts/upgrade b/scripts/upgrade
index ff07693..9cfe1cc 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -274,16 +274,12 @@ chown -R "$app": "$final_path"
 
 pushd "$final_path/live"
     ynh_use_nodejs
-        if [ "$(lsb_release --codename --short)" == "jessie" ]; then
-	        sudo -u "$app" env PATH=$PATH /opt/rbenv/versions/2.6.5/bin/bundle install --deployment --without development test
-        else
-	        sudo -u "$app" env PATH=$PATH /opt/rbenv/versions/2.6.5/bin/bundle install --deployment --force --without development test
-        fi
-        sudo -u "$app" env PATH=$PATH yarn install --pure-lockfile
-        sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.5/bin/bundle exec rails assets:clean
-        sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.5/bin/bundle exec rails assets:precompile
-        sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.5/bin/bundle exec rails db:migrate
-        sudo -u "$app" env PATH=$PATH RAILS_ENV=production bin/tootctl cache clear
+    sudo -u "$app" env PATH=$PATH /opt/rbenv/versions/2.6.5/bin/bundle install -j$(getconf _NPROCESSORS_ONLN) --deployment --without development test
+    sudo -u "$app" env PATH=$PATH yarn install --pure-lockfile
+    sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.5/bin/bundle exec rails assets:clean
+    sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.5/bin/bundle exec rails assets:precompile
+    sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.5/bin/bundle exec rails db:migrate
+    sudo -u "$app" env PATH=$PATH RAILS_ENV=production bin/tootctl cache clear
 popd
 
 # If vapid_private_key doesn't exist, retrieve it or create it