diff --git a/scripts/upgrade b/scripts/upgrade
new file mode 100644
index 0000000..dc67387
--- /dev/null
+++ b/scripts/upgrade
@@ -0,0 +1,53 @@
+#!/bin/bash
+
+# Exit on command errors and treat unset variables as an error
+set -eu
+
+# Load common variables and functions
+source ./_common.sh
+
+# Retrieve arguments
+domain=$(ynh_app_setting_get "$app" domain)
+path=$(ynh_app_setting_get "$app" path)
+is_public=$(ynh_app_setting_get "$app" is_public)
+
+# Install the app
+
+  # Copy files to the right place
+final_path=/var/www/$app
+extract_source
+
+  # Files owned by root, www-data can just read
+sudo chown www-data:www-data $final_path -R
+sudo chmod 755 $final_path -R
+
+  # Modify Nginx configuration file and copy it to Nginx conf directory
+sed -i "s@YNH_WWW_PATH@$path@g" ../conf/nginx.conf
+sed -i "s@YNH_WWW_ALIAS@$final_path/@g" ../conf/nginx.conf
+nginxconf=/etc/nginx/conf.d/$domain.d/$app.conf
+sudo cp ../conf/nginx.conf $nginxconf
+sudo chown root: $nginxconf
+sudo chmod 600 $nginxconf
+pushd $final_path
+sudo npm install
+popd
+sudo service redis-server start
+sudo yunohost firewall allow Both 85
+pre_inst_scrumblr
+sudo service scrumblr start
+sudo systemctl start "$app".service
+
+
+
+ynh_app_setting_set "$app" is_public "$is_public"
+if [ "$is_public" = 0 ];
+then
+  ynh_app_setting_set "$app" unprotected_uris "/"
+fi
+
+sudo service nginx reload
+sudo yunohost service add "$app" --log /var/log/"$app"/"$app".log
+sudo yunohost app ssowatconf
+
+# Start scrumblr
+sudo systemctl restart "$app".service