diff --git a/scripts/upgrade b/scripts/upgrade
index e2ec6d3..8908f70 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 #=================================================
-# GENERIC STARTING
+# GENERIC START
 #=================================================
 # IMPORT GENERIC HELPERS
 #=================================================
@@ -12,6 +12,7 @@ source /usr/share/yunohost/helpers
 #=================================================
 # LOAD SETTINGS
 #=================================================
+ynh_print_info "Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
@@ -29,6 +30,7 @@ upgrade_type=$(ynh_check_app_version_changed)
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
+ynh_print_info "Ensuring downward compatibility..."
 
 # If port doesn't exist, create it
 if [ -z "$port" ]; then
@@ -39,6 +41,7 @@ fi
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
+ynh_print_info "Backing up the app before upgrading... (may take a while)"
 
 # Backup the current version of the app
 ynh_backup_before_upgrade
@@ -53,7 +56,8 @@ ynh_abort_if_errors
 # CHECK THE PATH
 #=================================================
 
-path_url=$(ynh_normalize_url_path $path_url)	# Vérifie et corrige la syntaxe du path.
+# Normalize the URL path syntax
+path_url=$(ynh_normalize_url_path $path_url)
 
 #=================================================
 # ACTIVATE MAINTENANCE MODE
@@ -66,29 +70,38 @@ ynh_maintenance_mode_ON
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
+ynh_print_info "Upgrading source files..."
 
 if [ "$upgrade_type" == "UPGRADE_APP" ]
 then
-	ynh_setup_source "$final_path"	# Télécharge la source, décompresse et copie dans $final_path
+	# Download, check integrity, uncompress and patch the source from app.src
+	ynh_setup_source "$final_path"
 fi
 
-#=================================================
-# UPGRADE DEPENDENCIES
-#=================================================
-
-ynh_install_app_dependencies python-virtualenv sqlite3 zlib1g-dev
-
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
+ynh_print_info "Upgrading nginx configuration..."
 
+# Create a dedicated nginx config
 ynh_add_nginx_config
 
+#=================================================
+# UPGRADE DEPENDENCIES
+#=================================================
+ynh_print_info "Upgrading dependencies..."
+
+ynh_install_app_dependencies python-virtualenv sqlite3 zlib1g-dev
+
+
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
+ynh_print_info "Making sure dedicated system user exists..."
+
+# Create a dedicated user (if not existing)
+ynh_system_user_create $app
 
-ynh_system_user_create $app	# Create the dedicated user, if not exist
 
 #=================================================
 # SPECIFIC UPGRADE
@@ -108,17 +121,18 @@ ynh_store_file_checksum "/etc/systemd/system/$app.service"
 systemctl daemon-reload
 
 #=================================================
-# GENERIC FINALISATION
+# GENERIC FINALIZATION
 #=================================================
-#=================================================
-# SECURING FILES AND DIRECTORIES
+# SECURE FILES AND DIRECTORIES
 #=================================================
 
+# Set permissions on app files
 chown -R $app:root $final_path
 
 #=================================================
 # SETUP SSOWAT
 #=================================================
+ynh_print_info "Upgrading SSOwat configuration..."
 
 # Make app public
 ynh_app_setting_set $app skipped_uris "/"
@@ -126,6 +140,7 @@ ynh_app_setting_set $app skipped_uris "/"
 #=================================================
 # RELOAD NGINX
 #=================================================
+ynh_print_info "Reloading nginx..."
 
 ynh_system_reload --service_name=nginx
 
@@ -141,3 +156,9 @@ ynh_system_reload --service_name=$app --action=restart
 #=================================================
 
 ynh_maintenance_mode_OFF
+
+#=================================================
+# END OF SCRIPT
+#=================================================
+
+ynh_print_info "Upgrade of $app completed"