diff --git a/conf/config.json b/conf/config.json
index a316b24..a7fb25b 100644
--- a/conf/config.json
+++ b/conf/config.json
@@ -31,7 +31,8 @@
         "verify_peer": false,
         "verify_peer_name": false
       }
-    }
+    },
+    "trusted_proxies": [ "127.0.0.1", "::1" ]
   },
   "apps": {
     "user_ldap": {
diff --git a/conf/nginx.conf b/conf/nginx.conf
index f2baa60..9aac4df 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -165,6 +165,8 @@ location ^~ __PATH__/ {
     try_files $uri / __PATH__/index.php$request_uri;
   }
 
+  include conf.d/__DOMAIN__.d/__APP__.d/*.conf;
+
   # show YunoHost panel access
   include conf.d/yunohost_panel.conf.inc;
 }
diff --git a/conf/notify_push.conf b/conf/notify_push.conf
new file mode 100644
index 0000000..f2fb052
--- /dev/null
+++ b/conf/notify_push.conf
@@ -0,0 +1,8 @@
+location ^~ __PATH__/push/ {
+   proxy_pass http://unix:/var/run/__APP__/notify-push.sock:/;
+   proxy_http_version 1.1;
+   proxy_set_header Upgrade $http_upgrade;
+   proxy_set_header Connection "Upgrade";
+   proxy_set_header Host $host;
+   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+}
\ No newline at end of file
diff --git a/conf/systemd.service b/conf/systemd.service
new file mode 100644
index 0000000..855a294
--- /dev/null
+++ b/conf/systemd.service
@@ -0,0 +1,13 @@
+[Unit]
+Description = Push daemon for Nextcloud clients
+
+[Service]
+Environment=SOCKET_PATH=/var/run/__APP__/notify-push.sock
+Environment=ALLOW_SELF_SIGNED=true
+ExecStart=__INSTALL_DIR__/apps/notify_push/bin/__ARCH__/notify_push __INSTALL_DIR__/config/config.php
+Type=notify
+User=__APP__
+Group=__APP__
+
+[Install]
+WantedBy = multi-user.target
\ No newline at end of file
diff --git a/conf/watcher.path b/conf/watcher.path
new file mode 100644
index 0000000..67a5298
--- /dev/null
+++ b/conf/watcher.path
@@ -0,0 +1,11 @@
+[Unit]
+Description=Restart Push daemon for Nextcloud clients when it receives updates
+Documentation=https://github.com/nextcloud/notify_push
+PartOf=__APP__-notify-push-watcher.service
+
+[Path]
+PathModified=/var/www/nextcloud/apps/notify_push/bin/__ARCH__/notify_push
+Unit=__APP__-notify-push-watcher.service
+
+[Install]
+WantedBy=multi-user.target
\ No newline at end of file
diff --git a/conf/watcher.service b/conf/watcher.service
new file mode 100644
index 0000000..e2d9cfd
--- /dev/null
+++ b/conf/watcher.service
@@ -0,0 +1,15 @@
+[Unit]
+Description=Restart Push daemon for Nextcloud clients when it receives updates
+Documentation=https://github.com/nextcloud/notify_push
+#Requires=__APP__-notify-push.service
+After=__APP__-notify-push.service
+StartLimitIntervalSec=10
+StartLimitBurst=5
+
+[Service]
+Type=oneshot
+ExecStartPre=/usr/bin/chmod u+x __INSTALL_DIR__/apps/notify_push/bin/__ARCH__/notify_push
+ExecStart=/usr/bin/systemctl restart __APP__-notify-push.service
+
+[Install]
+WantedBy=multi-user.target
\ No newline at end of file
diff --git a/config_panel.toml b/config_panel.toml
index e5e88ae..b583fb4 100644
--- a/config_panel.toml
+++ b/config_panel.toml
@@ -9,7 +9,7 @@ name = "Nextcloud configuration"
         [main.maintenance.maintenance_mode]
         ask = "Enable maintenance mode"
         type = "boolean"
-        default = "0"
+        default = false
 
         [main.maintenance.set_permissions_button]
         ask.en = "Set permissions for all data (Can take up to several hours if users have a lot of data)"
@@ -22,8 +22,14 @@ name = "Nextcloud configuration"
         [main.addressbook.system_addressbook_exposed]
         ask = "Should there be a system address book listing all users, accessible by all users?"
         type = "boolean"
-        yes = "yes"
-        no = "no"
+
+    [main.notify_push]
+    name = "Notify Push configuration"
+
+        [main.notify_push.enable_notify_push]
+        ask.en = "Configure the High Performance Backend?"
+        ask.fr = "Configurer le Backend Hautes Performances ?"
+        type = "boolean"
 
     [main.php_fpm_config]
     name = "PHP-FPM configuration"
diff --git a/doc/ADMIN.md b/doc/ADMIN.md
index 8d401d2..9b19c1b 100644
--- a/doc/ADMIN.md
+++ b/doc/ADMIN.md
@@ -12,6 +12,10 @@ Alternatively, you may open a 'Nextcloud shell' with `sudo yunohost app shell __
 
 ONLYOFFICE is an online rich text document editor which can be integrated in Nextcloud
 
+#### High Performance Backend
+
+High Performance Backend is an application on Nextcloud that should speed up the instance, more information here: https://github.com/nextcloud/notify_push#about
+
 #### With YunoHost App (ARM64 support, better performance)
 
 For better performance and ARM64 support (Raspberry Pi, OLinuXino...), install the [OnlyOffice YunoHost app](https://apps.yunohost.org/app/onlyoffice) and connect it to Nextcloud, see the tutorial in the [doc of onlyoffice_ynh package](https://github.com/YunoHost-Apps/onlyoffice_ynh/blob/master/README_fr.md#configuration-de-onlyoffice-server)
diff --git a/doc/ADMIN_fr.md b/doc/ADMIN_fr.md
index 06b76b1..5b52928 100644
--- a/doc/ADMIN_fr.md
+++ b/doc/ADMIN_fr.md
@@ -12,6 +12,10 @@ Ou bien, vous pouvez ouvrir un "shell Nextcloud" avec `sudo yunohost app shell _
 
 ONLYOFFICE est un éditeur de texte enrichi en ligne qui peut s'intégrer dans Nextcloud
 
+#### Backend Hautes Performances
+
+Le backend Hautes Performances est une application sur Nextcloud qui devrait accélérer l'instance, plus d'informations ici : https://github.com/nextcloud/notify_push#about
+
 #### Avec l'application YunoHost (support ARM64, meilleures performances)
 
 Pour de meilleures performances et le support de ARM64 (Raspberry Pi, OLinuXino...), installez l'[app YunoHost OnlyOffice](https://apps.yunohost.org/app/onlyoffice), puis connectez-la à Nextcloud : voir le tutoriel dans la [doc du paquet onlyoffice_ynh](https://github.com/YunoHost-Apps/onlyoffice_ynh/blob/master/README_fr.md#configuration-de-onlyoffice-server)
diff --git a/manifest.toml b/manifest.toml
index b3e7d35..92ed534 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -60,6 +60,12 @@ ram.runtime = "512M"
     type = "boolean"
     default = true
 
+    [install.enable_notify_push]
+    ask.en = "Configure the High Performance Backend?"
+    ask.fr = "Configurer le Backend Hautes Performances ?"
+    type = "boolean"
+    default = false
+
 [resources]
 
     [resources.sources]
diff --git a/scripts/backup b/scripts/backup
index 995b795..02d8210 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -27,7 +27,14 @@ ynh_backup --src_path="$install_dir"
 ynh_backup --src_path="$data_dir" --is_big
 
 #=================================================
-# SYSTEM CONFIGURATION
+# BACKUP THE NGINX CONFIGURATION
+#=================================================
+
+ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
+ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.d"
+
+#=================================================
+# BACKUP THE PHP-FPM CONFIGURATION
 #=================================================
 
 # Backup the PHP-FPM configuration
@@ -58,6 +65,17 @@ ynh_print_info --message="Backing up the PostgreSQL database..."
 
 ynh_psql_dump_db --database="$db_name" > db.sql
 
+#=================================================
+# BACKUP THE NOTIFY_PUSH APP
+#=================================================
+
+if [ $enable_notify_push -eq 1 ]
+then
+    ynh_backup --src_path="/etc/systemd/system/${app}-notify-push.service"
+    ynh_backup --src_path="/etc/systemd/system/${app}-notify-push-watcher.service"
+    ynh_backup --src_path="/etc/systemd/system/${app}-notify-push-watcher.path"
+fi
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/change_url b/scripts/change_url
index 3606d8d..326594f 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -50,16 +50,62 @@ then
 
     # Reload PHP-FPM, necessary for force Nextcloud to re-read config.php, cf opcache.revalidate_freq
     ynh_systemd_action --service_name=php${phpversion}-fpm --action=reload
+
+    mv /etc/nginx/conf.d/$old_domain.d/$app.d /etc/nginx/conf.d/$new_domain.d/$app.d
 fi
 
 #=================================================
-# SETUP SSOWAT
+# CONFIGURE NOTIFY_PUSH APP
 #=================================================
-ynh_script_progression --message="Configuring permissions..." --weight=1
+
+if [ $enable_notify_push -eq 1 ]
+then
+    domain="$new_domain"
+    path_url="$new_path"
+
+    ynh_add_config --template="notify_push.conf" --destination="/etc/nginx/conf.d/$domain.d/$app.d/notify_push.conf"
+
+    ynh_systemd_action --service_name=nginx --action=reload
+
+    case $YNH_ARCH in
+        amd64) arch="x86_64";;
+        arm64) arch="aarch64";;
+        armel|armhf) arch="armv7";;
+    esac
+
+    ynh_add_config --template="watcher.path" --destination="/etc/systemd/system/${app}-notify-push-watcher.path"
+    ynh_add_systemd_config --service="${app}-notify-push-watcher" --template="watcher.service"
+    systemctl enable --now ${app}-notify-push-watcher.path
+    ynh_add_systemd_config --service="${app}-notify-push"
+
+    count=0
+    while ! ynh_exec_as "$app" php${phpversion} --define apc.enable_cli=1 $install_dir/cron.php && [[ $count -lt 30 ]]
+    do
+        sleep 1
+        count=$((count + 1))
+    done
+
+    ynh_systemd_action --service_name="${app}-notify-push" --action=restart --line_match="Push daemon for Nextcloud clients." --log_path="systemd" --action=restart
+
+    exec_occ config:app:set notify_push base_endpoint --value https://$domain${path_url%/}/push
+
+    if ! exec_occ notify_push:self-test; then
+        ynh_print_warn --message="The High Performance Backend service is still not working properly. Please log in with a user to your NextCloud instance, restart the High Performance Backend service with \"systemctl restart ${app}-notify-push.service\", and run \"sudo -u $app php${phpversion} $install_dir/occ notify_push:self-test\" to verify that everything is green."
+    fi
+fi
+
+#=================================================
+# GENERIC FINALISATION
+#=================================================
+# RELOAD NGINX
+#=================================================
+ynh_script_progression --message="Reloading NGINX web server..."
 
 # Temporary fix for the API permission (workaround for https://github.com/YunoHost/issues/issues/2294 )
 ynh_permission_url --permission="api" --url="re:$new_domain\/.well-known\/.*" --auth_header="false" --clear_urls
 
+ynh_systemd_action --service_name=nginx --action=reload
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/config b/scripts/config
index e231009..189c448 100644
--- a/scripts/config
+++ b/scripts/config
@@ -18,6 +18,11 @@ ynh_abort_if_errors
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 current_fpm_footprint=$(ynh_app_setting_get --app=$app --key=fpm_footprint)
 
+exec_occ() {
+  (cd "$install_dir" && ynh_exec_as "$app" \
+      php${phpversion} --define apc.enable_cli=1 occ --no-interaction --no-ansi "$@")
+}
+
 #=================================================
 # SPECIFIC GETTERS FOR TOML SHORT KEY
 #=================================================
@@ -39,8 +44,7 @@ get__maintenance_mode() {
 }
 
 get__system_addressbook_exposed() {
-	echo $(cd "$install_dir" && ynh_exec_as "$app" \
-	          php${phpversion} --define apc.enable_cli=1 occ config:app:get dav system_addressbook_exposed)
+	echo $(exec_occ config:app:get dav system_addressbook_exposed)
 }
 
 get__fpm_footprint() {
@@ -73,24 +77,88 @@ get__fpm_free_footprint() {
 set__maintenance_mode() {
     if [ "$maintenance_mode" -eq "0" ]; then
         # If maintenance_mode was set to 0, disable maintenance mode
-        (cd "$install_dir" && ynh_exec_as "$app" \
-            php${phpversion} --define apc.enable_cli=1 occ --no-interaction --no-ansi maintenance:mode --off)
+        exec_occ maintenance:mode --off
         ynh_print_info "Maintenance mode disabled"
     elif [ "$maintenance_mode" -eq "1" ]; then
         # If maintenance_mode was set to 1, enable maintenance mode
-        (cd "$install_dir" && ynh_exec_as "$app" \
-            php${phpversion} --define apc.enable_cli=1 occ --no-interaction --no-ansi maintenance:mode --on)
+        exec_occ maintenance:mode --on
         ynh_print_info "Maintenance mode enabled"
     fi
     ynh_app_setting_set --app=$app --key=maintenance_mode --value="$maintenance_mode"
 }
 
 set__system_addressbook_exposed() {
-	(cd "$install_dir" && ynh_exec_as "$app" \
-		          php${phpversion} --define apc.enable_cli=1 occ config:app:set dav system_addressbook_exposed --value="$system_addressbook_exposed")
+	exec_occ config:app:set dav system_addressbook_exposed --value="$system_addressbook_exposed"
 	ynh_print_info "System addressbook is exposed: $system_addressbook_exposed"
 }
 
+
+set__enable_notify_push() {
+    if [ "$enable_notify_push" -eq "0" ]; then
+        nginx_extra_conf_dir="/etc/nginx/conf.d/$domain.d/$app.d"
+        ynh_secure_remove --file="$nginx_extra_conf_dir/notify_push.conf"
+        ynh_systemd_action --service_name="nginx" --action=reload
+
+        # If notify_push is enabled, disable it
+        if exec_occ app:list | awk '/Enabled/{f=1;next} f' | grep -q -w notify_push; then
+            exec_occ app:disable notify_push
+        fi
+
+        ynh_remove_systemd_config --service="${app}-notify-push"
+        systemctl disable --now "${app}-notify-push-watcher.path"
+        ynh_secure_remove --file="/etc/systemd/system/${app}-notify-push-watcher.path"
+        ynh_remove_systemd_config --service="${app}-notify-push-watcher"
+
+        ynh_print_info "Notify push disabled"
+    elif [ "$enable_notify_push" -eq "1" ]; then
+        nginx_extra_conf_dir="/etc/nginx/conf.d/$domain.d/$app.d"
+        mkdir -p "$nginx_extra_conf_dir"
+
+        ynh_add_config --template="notify_push.conf" --destination="$nginx_extra_conf_dir/notify_push.conf"
+
+        ynh_systemd_action --service_name="nginx" --action=reload
+
+        # If notify_push is disabled, reenable it
+        if exec_occ app:list | awk '/Disabled/{f=1;next} f' | grep -q -w notify_push; then
+            exec_occ app:enable notify_push
+        # If notify_push is not installed, install it
+        elif ! exec_occ app:list | awk '/Enabled/{f=1;next} /Disabled/{f=0} f' | grep -q -w notify_push; then
+            exec_occ app:install notify_push
+        fi
+        exec_occ config:app:set notify_push base_endpoint --value https://$domain${path_url%/}/push
+
+        mkdir -p /var/run/$app/
+        chown $app: /var/run/$app/
+
+        case $YNH_ARCH in
+            amd64) arch="x86_64";;
+            arm64) arch="aarch64";;
+            armel|armhf) arch="armv7";;
+        esac
+
+        ynh_add_config --template="watcher.path" --destination="/etc/systemd/system/${app}-notify-push-watcher.path"
+        ynh_add_systemd_config --service="${app}-notify-push-watcher" --template="watcher.service"
+        systemctl enable --now ${app}-notify-push-watcher.path
+        ynh_add_systemd_config --service="${app}-notify-push"
+        
+        count=0
+        while ! ynh_exec_as "$app" php${phpversion} --define apc.enable_cli=1 $install_dir/cron.php && [[ $count -lt 30 ]]
+        do
+            sleep 1
+            count=$((count + 1))
+        done
+
+        ynh_systemd_action --service_name="${app}-notify-push-watcher" --action=restart
+        ynh_systemd_action --service_name="${app}-notify-push" --action=restart --line_match="Push daemon for Nextcloud clients." --log_path="systemd"
+        
+        if ! exec_occ notify_push:self-test; then
+            ynh_print_warn --message="The High Performance Backend service is still not working properly. Please log in with a user to your NextCloud instance, restart the High Performance Backend service with \"systemctl restart ${app}-notify-push.service\", and run \"sudo -u $app php${phpversion} $install_dir/occ notify_push:self-test\" to verify that everything is green."
+        fi
+        ynh_print_info "Notify push enabled"
+    fi
+    ynh_app_setting_set --app=$app --key=enable_notify_push --value="$enable_notify_push"
+}
+
 set__fpm_footprint() {
     if [ "$fpm_footprint" != "specific" ]
     then
diff --git a/scripts/install b/scripts/install
index e334886..5927297 100755
--- a/scripts/install
+++ b/scripts/install
@@ -40,6 +40,14 @@ then
     sed --in-place --regexp-extended '/location = \/\.well\-known\/(caldav|carddav)/d' "../conf/nginx.conf"
 fi
 
+nginx_extra_conf_dir="/etc/nginx/conf.d/$domain.d/$app.d"
+mkdir -p "$nginx_extra_conf_dir"
+
+if [ $enable_notify_push -eq 1 ]
+then
+    ynh_add_config --template="notify_push.conf" --destination="$nginx_extra_conf_dir/notify_push.conf"
+fi
+
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
@@ -187,6 +195,30 @@ exec_occ config:app:set dav system_addressbook_exposed --value="$system_addressb
 # Calculate and store the config file checksum into the app settings
 ynh_store_file_checksum --file="$install_dir/config/config.php"
 
+#=================================================
+# CONFIGURE NOTIFY_PUSH APP
+#=================================================
+
+if [ $enable_notify_push -eq 1 ]
+then
+    exec_occ app:install notify_push
+    exec_occ config:app:set notify_push base_endpoint --value https://$domain${path_url%/}/push
+
+    mkdir -p /var/run/$app/
+    chown $app: /var/run/$app/
+
+    case $YNH_ARCH in
+        amd64) arch="x86_64";;
+        arm64) arch="aarch64";;
+        armel|armhf) arch="armv7";;
+    esac
+
+    ynh_add_config --template="watcher.path" --destination="/etc/systemd/system/${app}-notify-push-watcher.path"
+    ynh_add_systemd_config --service="${app}-notify-push-watcher" --template="watcher.service"
+    systemctl enable --now ${app}-notify-push-watcher.path
+    ynh_add_systemd_config --service="${app}-notify-push"
+fi
+
 #=================================================
 # ADD A CRON JOB
 #=================================================
@@ -255,6 +287,27 @@ ynh_script_progression --message="Configuring Fail2Ban..." --weight=8
 # Create a dedicated Fail2Ban config
 ynh_add_fail2ban_config --logpath="/var/log/$app/nextcloud.log" --failregex="^.*Login failed: '.*' \(Remote IP: '<HOST>'.*$" --max_retry=5
 
+#=================================================
+# CHECK IF NOTIFY_PUSH WORKS
+#=================================================
+
+if [ $enable_notify_push -eq 1 ]
+then
+    count=0
+    while ! ynh_exec_as "$app" php${phpversion} --define apc.enable_cli=1 $install_dir/cron.php && [[ $count -lt 30 ]]
+    do
+        sleep 1
+        count=$((count + 1))
+    done
+
+    ynh_systemd_action --service_name="${app}-notify-push-watcher" --action=restart
+    ynh_systemd_action --service_name="${app}-notify-push" --action=restart --line_match="Push daemon for Nextcloud clients." --log_path="systemd"
+    
+    if ! exec_occ notify_push:self-test; then
+        ynh_print_warn --message="The High Performance Backend service is still not working properly. Please log in with a user to your NextCloud instance, restart the High Performance Backend service with \"systemctl restart ${app}-notify-push.service\", and run \"sudo -u $app php${phpversion} $install_dir/occ notify_push:self-test\" to verify that everything is green."
+    fi
+fi
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index a0f4ba6..d03050c 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -12,6 +12,7 @@ ynh_script_progression --message="Removing system configurations related to $app
 
 # Remove the dedicated NGINX config
 ynh_remove_nginx_config
+ynh_secure_remove --file="/etc/nginx/conf.d/$domain.d/$app.d"
 
 # Remove the dedicated PHP-FPM config
 ynh_remove_fpm_config
@@ -22,6 +23,13 @@ ynh_remove_logrotate
 # Remove the dedicated Fail2Ban config
 ynh_remove_fail2ban_config
 
+# Remove notify push
+ynh_remove_systemd_config --service="${app}-notify-push"
+ynh_exec_warn_less systemctl disable --now ${app}-notify-push-watcher.path
+ynh_secure_remove --file="/etc/systemd/system/${app}-notify-push-watcher.path"
+ynh_remove_systemd_config --service="${app}-notify-push-watcher"
+ynh_secure_remove --file="/var/run/$app"
+
 # Remove a cron file
 # TODO: Ensure that cron job is not running (How !?)
 ynh_secure_remove --file="/etc/cron.d/$app"
diff --git a/scripts/restore b/scripts/restore
index 89916f2..fcf8fe2 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -35,6 +35,7 @@ ynh_add_fpm_config
 #=================================================
 
 ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
+ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.d"
 
 # Check if .well-known is available for this domain
 if is_url_handled --domain="$domain" --path="/.well-known/caldav" || is_url_handled --domain="$domain" --path="/.well-known/carddav"
@@ -122,6 +123,24 @@ fi
 
 ynh_systemd_action --action=restart --service_name=fail2ban
 
+#=================================================
+# RESTORE THE NOTIFY_PUSH APP
+#=================================================
+
+if [ $enable_notify_push -eq 1 ]
+then
+    mkdir -p /var/run/$app/
+    chown $app: /var/run/$app/
+
+    ynh_restore_file --origin_path="/etc/systemd/system/${app}-notify-push.service"
+    ynh_restore_file --origin_path="/etc/systemd/system/${app}-notify-push-watcher.service"
+    ynh_restore_file --origin_path="/etc/systemd/system/${app}-notify-push-watcher.path"
+
+    systemctl enable --now "${app}-notify-push-watcher.service" --quiet
+    systemctl enable --now "${app}-notify-push-watcher.path" --quiet
+    systemctl enable --now "${app}-notify-push.service" --quiet
+fi
+
 #=================================================
 # GENERIC FINALIZATION
 #=================================================
@@ -131,6 +150,32 @@ ynh_script_progression --message="Reloading NGINX web server..." --weight=3
 
 ynh_systemd_action --service_name=nginx --action=reload
 
+#=================================================
+# CHECK IF NOTIFY_PUSH WORKS
+#=================================================
+
+exec_occ() {
+  (cd "$install_dir" && ynh_exec_as "$app" \
+      php${phpversion} --define apc.enable_cli=1 occ --no-interaction --no-ansi "$@")
+}
+
+if [ $enable_notify_push -eq 1 ]
+then
+    count=0
+    while ! ynh_exec_as "$app" php${phpversion} --define apc.enable_cli=1 $install_dir/cron.php && [[ $count -lt 30 ]]
+    do
+        sleep 1
+        count=$((count + 1))
+    done
+
+    ynh_systemd_action --service_name="${app}-notify-push-watcher" --action=restart
+    ynh_systemd_action --service_name="${app}-notify-push" --action=restart --line_match="Push daemon for Nextcloud clients." --log_path="systemd" --action=restart
+    
+    if ! exec_occ notify_push:self-test; then
+        ynh_print_warn --message="The High Performance Backend service is still not working properly. Please log in with a user to your NextCloud instance, restart the High Performance Backend service with \"systemctl restart ${app}-notify-push.service\", and run \"sudo -u $app php${phpversion} $install_dir/occ notify_push:self-test\" to verify that everything is green."
+    fi
+fi
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index bc75eb4..0703de3 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -24,6 +24,11 @@ elif [ "${system_addressbook_exposed,,}" = "no" ]; then
     system_addressbook_exposed=0
 fi
 
+if [ -z ${enable_notify_push:-} ]; then
+    ynh_app_setting_set --app=$app --key=enable_notify_push --value=0
+    enable_notify_push=0
+fi
+
 # Remove the option backup_core_only if it's in the settings.yml file
 ynh_app_setting_delete --app=$app --key=backup_core_only
 
@@ -390,9 +395,49 @@ then
     sed --in-place --regexp-extended '/location = \/\.well\-known\/(caldav|carddav)/d' "../conf/nginx.conf"
 fi
 
+# Create a dedicated NGINX config
+nginx_extra_conf_dir="/etc/nginx/conf.d/$domain.d/$app.d"
+mkdir -p "$nginx_extra_conf_dir"
+
+if [ $enable_notify_push -eq 1 ]
+then
+    ynh_add_config --template="notify_push.conf" --destination="$nginx_extra_conf_dir/notify_push.conf"
+fi
+
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
+#=================================================
+# CONFIGURE NOTIFY_PUSH APP
+#=================================================
+
+if [ $enable_notify_push -eq 1 ]
+then
+    # If notify_push is disabled, reenable it
+    if exec_occ app:list | awk '/Disabled/{f=1;next} f' | grep -q -w notify_push; then
+        exec_occ app:enable notify_push
+    # If notify_push is not installed, install it
+    elif ! exec_occ app:list | awk '/Enabled/{f=1;next} /Disabled/{f=0} f' | grep -q -w notify_push; then
+        exec_occ app:install notify_push
+    fi
+    exec_occ config:app:set notify_push base_endpoint --value https://$domain${path_url%/}/push
+
+    mkdir -p /var/run/$app/
+    chown $app: /var/run/$app/
+
+    case $YNH_ARCH in
+        amd64) arch="x86_64";;
+        arm64) arch="aarch64";;
+        armel|armhf) arch="armv7";;
+    esac
+
+    ynh_add_config --template="watcher.path" --destination="/etc/systemd/system/${app}-notify-push-watcher.path"
+    ynh_add_systemd_config --service="${app}-notify-push-watcher" --template="watcher.service"
+    systemctl enable --now ${app}-notify-push-watcher.path
+    ynh_add_systemd_config --service="${app}-notify-push"
+fi
+
+
 #=================================================
 # CRON JOB
 #=================================================
@@ -417,6 +462,27 @@ ynh_use_logrotate --non-append
 # Create a dedicated Fail2Ban config
 ynh_add_fail2ban_config --logpath="/var/log/$app/nextcloud.log" --failregex="^.*Login failed: '.*' \(Remote IP: '<HOST>'.*$" --max_retry=5
 
+#=================================================
+# CHECK IF NOTIFY_PUSH WORKS
+#=================================================
+
+if [ $enable_notify_push -eq 1 ]
+then
+    count=0
+    while ! ynh_exec_as "$app" php${phpversion} --define apc.enable_cli=1 $install_dir/cron.php && [[ $count -lt 30 ]]
+    do
+        sleep 1
+        count=$((count + 1))
+    done
+
+    ynh_systemd_action --service_name="${app}-notify-push-watcher" --action=restart
+    ynh_systemd_action --service_name="${app}-notify-push" --action=restart --line_match="Push daemon for Nextcloud clients." --log_path="systemd" --action=restart
+
+    if ! exec_occ notify_push:self-test; then
+        ynh_print_warn --message="The High Performance Backend service is still not working properly. Please log in with a user to your NextCloud instance, restart the High Performance Backend service with \"systemctl restart ${app}-notify-push.service\", and run \"sudo -u $app php${phpversion} $install_dir/occ notify_push:self-test\" to verify that everything is green."
+    fi
+fi
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/tests.toml b/tests.toml
index cdd5e77..a7671f2 100644
--- a/tests.toml
+++ b/tests.toml
@@ -2,6 +2,8 @@ test_format = 1.0
 
 [default]
 
+    args.enable_notify_push = "0"
+
     # -------------------------------
     # Commits to test upgrade from
     # -------------------------------
@@ -11,3 +13,10 @@ test_format = 1.0
     test_upgrade_from.9c6d1eea.name = "Upgrade from 27.1.4"
     test_upgrade_from.e9f82ab7.name = "Upgrade from 28.0.6"
     test_upgrade_from.e9f82ab7.args.system_addressbook_exposed = "yes"
+
+[notify_push_test]
+
+    args.enable_notify_push = "1"
+    test_upgrade_from.e9f82ab7.name = "Upgrade from 28.0.6"
+    test_upgrade_from.e9f82ab7.args.system_addressbook_exposed = "yes"
+