diff --git a/README.md b/README.md
index 1fc161c..2695e93 100644
--- a/README.md
+++ b/README.md
@@ -5,13 +5,13 @@
 
 *[Lire ce readme en français.](./README_fr.md)*
 
-> *This package allow you to install jenkins quickly and simply on a YunoHost server.  
+> *This package allow you to install Jenkins quickly and simply on a YunoHost server.  
 If you don't have YunoHost, please see [here](https://yunohost.org/#/install) to know how to install and enjoy it.*
 
 ## Overview
 The leading open source automation server, Jenkins provides hundreds of plugins to support building, deploying and automating any project.
 
-**Shipped version:** 2.235.2
+**Shipped version:** 2.263.1
 
 ## Screenshots
 
@@ -38,14 +38,11 @@ Supported, with LDAP and SSO.
 
 #### Supported architectures
 
-* x86-64b - [![](https://ci-apps.yunohost.org/ci/logs/jenkins%20%28Apps%29.svg)](https://ci-apps.yunohost.org/ci/apps/jenkins/)
+* x86-64 - [![](https://ci-apps.yunohost.org/ci/logs/jenkins%20%28Apps%29.svg)](https://ci-apps.yunohost.org/ci/apps/jenkins/)
 * ARMv8-A - [![](https://ci-apps-arm.yunohost.org/ci/logs/jenkins%20%28Apps%29.svg)](https://ci-apps-arm.yunohost.org/ci/apps/jenkins/)
-* Jessie x86-64b - [![](https://ci-stretch.nohost.me/ci/logs/jenkins%20%28Apps%29.svg)](https://ci-stretch.nohost.me/ci/apps/jenkins/)
 
 ## Limitations
 
-* Can't be updated after the current version 2.46, because it need some packages not available on jessie.
-
 ## Additionnal informations
 
 ## Links
@@ -57,8 +54,7 @@ Supported, with LDAP and SSO.
 
 ---
 
-Developers infos
-----------------
+## Developers infos
 
 Please do your pull request to the [testing branch](https://github.com/YunoHost-Apps/jenkins_ynh/tree/testing).
 
diff --git a/README_fr.md b/README_fr.md
index 9c58c84..b511a8c 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -5,13 +5,13 @@
 
 *[Read this readme in english.](./README.md)*
 
-> *Ce package vous permet d'installer jenkins rapidement et simplement sur un serveur YunoHost.  
+> *Ce package vous permet d'installer Jenkins rapidement et simplement sur un serveur YunoHost.  
 Si vous n'avez pas YunoHost, merci de regarder [ici](https://yunohost.org/#/install_fr) pour savoir comment l'installer et en profiter.*
 
-## Résumé
+## Vue d'ensemble
 Premier serveur d'automatisation open source, Jenkins fournit des centaines de plugins pour supporter la construction, le déploiement et l'automatisation de n'importe quel projet.
 
-**Version embarquée:** 2.235.2
+**Version embarquée :** 2.263.1
 
 ## Captures d'écran
 
@@ -27,8 +27,8 @@ Utiliser le panneau d'administration de votre Jenkins pour configurer cette appl
 
 ## Documentation
 
- * Documentation officielle: https://jenkins.io/doc/
- * Documentation YunoHost: Il n'y a pas d'autre documentation, n'hésitez pas à contribuer.
+ * Documentation officielle : https://jenkins.io/doc/
+ * Documentation YunoHost : Il n'y a pas d'autre documentation, n'hésitez pas à contribuer.
 
 ## Fonctionnalités spécifiques à YunoHost
 
@@ -38,27 +38,23 @@ Supportée, avec LDAP et SSO.
 
 #### Architectures supportées.
 
-* x86-64b - [![](https://ci-apps.yunohost.org/ci/logs/jenkins%20%28Apps%29.svg)](https://ci-apps.yunohost.org/ci/apps/jenkins/)
+* x86-64 - [![](https://ci-apps.yunohost.org/ci/logs/jenkins%20%28Apps%29.svg)](https://ci-apps.yunohost.org/ci/apps/jenkins/)
 * ARMv8-A - [![](https://ci-apps-arm.yunohost.org/ci/logs/jenkins%20%28Apps%29.svg)](https://ci-apps-arm.yunohost.org/ci/apps/jenkins/)
-* Jessie x86-64b - [![](https://ci-stretch.nohost.me/ci/logs/jenkins%20%28Apps%29.svg)](https://ci-stretch.nohost.me/ci/apps/jenkins/)
 
 ## Limitations
 
-* Ne peut pas être mis à jour après la version actuelle 2.46, car il a besoin de certains paquets qui ne sont pas disponibles sur jessie.
-
 ## Informations additionnelles
 
 ## Liens
 
- * Reporter un bug: https://github.com/YunoHost-Apps/jenkins_ynh/issues
- * Site de jenkins: https://jenkins.io
- * Dépôt git de jenkins: https://github.com/jenkinsci/jenkins
- * Site de YunoHost: https://yunohost.org/
+ * Reporter un bug : https://github.com/YunoHost-Apps/jenkins_ynh/issues
+ * Site de jenkins : https://jenkins.io
+ * Dépôt git de Jenkins : https://github.com/jenkinsci/jenkins
+ * Site de YunoHost : https://yunohost.org/
 
 ---
 
-Informations à l'intention des développeurs
-----------------
+## Informations à l'intention des développeurs
 
 Merci de faire vos pull request sur la [branche testing](https://github.com/YunoHost-Apps/jenkins_ynh/tree/testing).
 
diff --git a/check_process b/check_process
index 8c878e0..ff22049 100644
--- a/check_process
+++ b/check_process
@@ -17,8 +17,6 @@
 		incorrect_path=1
 		port_already_use=1	(8080)
 		change_url=1
-;;; Levels
-	Level 5=auto
 ;;; Options
 Email=
 Notification=down
diff --git a/conf/app.src b/conf/app.src
index 4b35df4..fe47360 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,6 +1,6 @@
-SOURCE_URL=https://pkg.jenkins.io/debian-stable/binary/jenkins_2.235.2_all.deb
-SOURCE_SUM=536f5486831243337312e7995a10b993
-SOURCE_SUM_PRG=md5sum
+SOURCE_URL=https://pkg.jenkins.io/debian-stable/binary/jenkins_2.263.1_all.deb
+SOURCE_SUM=faae72cc486c3032be31d47ddcaa7bce77aba54ad6bb900ec73550f8096348ba
+SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=deb
 SOURCE_IN_SUBDIR=true
 SOURCE_FILENAME=jenkins.deb
diff --git a/manifest.json b/manifest.json
index aba0f02..6ea98dd 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
 		"en": "Extendable continuous integration server",
 		"fr": "Serveur d'intégration continue extensible"
 	},
-	"version": "2.235.2~ynh1",
+	"version": "2.263.1~ynh1",
 	"url": "https://jenkins.io/index.html",
 	"license": "MIT",
 	"maintainer": {
@@ -18,7 +18,7 @@
 		"email": "maniackc_dev@crudelis.fr"
 	}],
 	"requirements": {
-		"yunohost": ">= 3.5.0"
+		"yunohost": ">= 4.0.0"
 	},
 	"multi_instance": false,
 	"services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 524416b..06458e4 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,28 +4,6 @@
 # PERSONAL HELPERS
 #=================================================
 
-#=================================================
-# BACKUP
-#=================================================
-
-HUMAN_SIZE () {	# Transforme une taille en Ko en une taille lisible pour un humain
-	human=$(numfmt --to=iec --from-unit=1K $1)
-	echo $human
-}
-
-CHECK_SIZE () {	# Vérifie avant chaque backup que l'espace est suffisant
-	file_to_analyse=$1
-	backup_size=$(du --summarize "$file_to_analyse" | cut -f1)
-	free_space=$(df --output=avail "/home/yunohost.backup" | sed 1d)
-
-	if [ $free_space -le $backup_size ]
-	then
-		ynh_print_err "Espace insuffisant pour sauvegarder $file_to_analyse."
-		ynh_print_err "Espace disponible: $(HUMAN_SIZE $free_space)"
-		ynh_die "Espace nécessaire: $(HUMAN_SIZE $backup_size)"
-	fi
-}
-
 #=================================================
 # PACKAGE CHECK BYPASSING...
 #=================================================
diff --git a/scripts/backup b/scripts/backup
index 736d88f..7e8dd97 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -22,7 +22,7 @@ ynh_abort_if_errors
 #=================================================
 # LOAD SETTINGS
 #=================================================
-ynh_script_progression --message="Loading installation settings..." --weight=3
+ynh_print_info --message="Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
@@ -30,22 +30,19 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 
 #=================================================
-# STANDARD BACKUP STEPS
+# DECLARE DATA AND CONF FILES TO BACKUP
+#=================================================
+ynh_print_info --message="Declaring files to be backed up..."
+
 #=================================================
 # BACKUP THE APP MAIN DIR
 #=================================================
-ynh_script_progression --message="Backing up the main app directory..." --weight=15
 
-ynh_systemd_action --action=stop --service_name=jenkins
-sleep 1
-
-CHECK_SIZE "$final_path"
 ynh_backup --src_path="$final_path"
 
 #=================================================
 # BACKUP THE NGINX CONFIGURATION
 #=================================================
-ynh_script_progression --message="Backing up nginx web server configuration..."
 
 ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
@@ -57,16 +54,8 @@ ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
 ynh_backup --src_path=/etc/default/$app
 
-#=================================================
-# CHECK JENKINS STARTING
-#=================================================
-ynh_script_progression --message="Restarting Jenkins..." --weight=20
-
-# Wait for Jenkins to be fully started
-ynh_systemd_action --line_match="Jenkins is fully up and running" --log_path="/var/log/$app/$app.log" --timeout="300"
-
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_script_progression --message="Backup script completed for $app. (YunoHost will then actually copy those files to the archive)." --last
+ynh_print_info --message="Backup script completed for $app. (YunoHost will then actually copy those files to the archive)."
diff --git a/scripts/change_url b/scripts/change_url
index 92a141c..e95c923 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -68,28 +68,28 @@ ynh_abort_if_errors
 #=================================================
 # MODIFY URL IN NGINX CONF
 #=================================================
-ynh_script_progression --message="Updating nginx web server configuration..." --weight=5
+ynh_script_progression --message="Updating NGINX web server configuration..." --weight=5
 
 nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf
 
-# Change the path in the nginx config file
+# Change the path in the NGINX config file
 if [ $change_path -eq 1 ]
 then
-	# Make a backup of the original nginx config file if modified
+	# Make a backup of the original NGINX config file if modified
 	ynh_backup_if_checksum_is_different --file="$nginx_conf_path"
 
-	# Set global variables for nginx helper
+	# Set global variables for NGINX helper
 	domain="$old_domain"
 	path_url="$new_path"
 
 	# Store path_url setting
 	ynh_app_setting_set --app=$app --key=path_url --value="$path_url"
 
-	# Create a dedicated nginx config
+	# Create a dedicated NGINX config
 	ynh_add_nginx_config
 fi
 
-# Change the domain for nginx
+# Change the domain for NGINX
 if [ $change_domain -eq 1 ]
 then
 	# Delete file checksum for the old conf file location
@@ -105,7 +105,7 @@ fi
 #=================================================
 # MODIFY JENKINS SETUP
 #=================================================
-ynh_script_progression --message="Updating jenkins setup..."
+ynh_script_progression --message="Updating Jenkins setup..."
 
 if [ $change_path -eq 1 ]
 then
diff --git a/scripts/install b/scripts/install
index 1b5ea60..ba3821b 100644
--- a/scripts/install
+++ b/scripts/install
@@ -82,9 +82,9 @@ ynh_install_app_dependencies $app_depencencies
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
-ynh_script_progression --message="Configuring nginx web server..." --weight=2
+ynh_script_progression --message="Configuring NGINX web server..." --weight=2
 
-# Create a dedicated nginx config
+# Create a dedicated NGINX config
 ynh_add_nginx_config
 
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index 13363b7..c80f0b7 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -44,9 +44,9 @@ ynh_secure_remove --file="/var/lib/jenkins"
 #=================================================
 # REMOVE THE NGINX CONFIGURATION
 #=================================================
-ynh_script_progression --message="Removing nginx web server configuration..." --weight=2
+ynh_script_progression --message="Removing NGINX web server configuration..." --weight=2
 
-# Remove the dedicated nginx config
+# Remove the dedicated NGINX config
 ynh_remove_nginx_config
 
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 2230f9d..6c0c43c 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -123,7 +123,7 @@ ynh_restore_file --origin_path=/etc/default/$app
 # ADVERTISE SERVICE IN ADMIN PANEL
 #=================================================
 
-yunohost service add $app --log "/var/log/$app/$app.log"
+yunohost service add $app --log="/var/log/$app/$app.log"
 
 #=================================================
 # CHECK JENKINS STARTING
diff --git a/scripts/upgrade b/scripts/upgrade
index 67cc22e..a1eb8ba 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -33,7 +33,7 @@ upgrade_type=$(ynh_check_app_version_changed)
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
-ynh_script_progression --message="Ensuring downward compatibility..."
+ynh_script_progression --message="Ensuring downward compatibility..." --weight=2
 
 # Fix is_public as a boolean
 if [ "$is_public" = "Yes" ]; then
@@ -122,9 +122,9 @@ ynh_install_app_dependencies $app_depencencies
 # Overwrite the nginx configuration only if it's allowed
 if [ $overwrite_nginx -eq 1 ]
 then
-	ynh_script_progression --message="Upgrading nginx web server configuration..." --weight=4
+	ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=4
 
-	# Create a dedicated nginx config
+	# Create a dedicated NGINX config
 	ynh_add_nginx_config
 fi
 
@@ -143,7 +143,7 @@ fi
 #=================================================
 # RELOAD NGINX
 #=================================================
-ynh_script_progression --message="Reloading nginx web server..." --weight=2
+ynh_script_progression --message="Reloading NGINX web server..." --weight=2
 
 ynh_systemd_action --action=reload --service_name=nginx