diff --git a/manifest.json b/manifest.json
index bb0516b..93d9994 100644
--- a/manifest.json
+++ b/manifest.json
@@ -3,8 +3,8 @@
     "id": "mattermost",
     "packaging_format": 1,
     "description": {
-        "en": "An open-source, self-hosted alternative to Slack",
-        "fr": "Une alternative open-source et auto-hébergée à Slack"
+        "en": "Open source collaboration platform built for developers",
+        "fr": "Plateforme de collaboration open source conçue pour les développeurs"
     },
     "version": "5.30.1~ynh1",
     "url": "http://www.mattermost.org/",
diff --git a/scripts/_common.sh b/scripts/_common.sh
index d0be5f5..7401a47 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,9 +4,6 @@
 # COMMON VARIABLES
 #=================================================
 
-# dependencies used by the app
-#pkg_dependencies="postgresql postgresql-contrib"
-
 #=================================================
 # PERSONAL HELPERS
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index e79d902..994719b 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -45,12 +45,18 @@ if [[ $is_public == "Yes" ]]; then
 elif [[ $is_public == "No" ]]; then
   is_public=0
 fi
-ynh_app_setting_set "$app" is_public "$is_public"
+ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 
 # Save the port used if not present
 if ! [[ "$port" ]]; then
   port=8065
-  ynh_app_setting_set "$app" port "$port"
+  ynh_app_setting_set --app=$app --key=port --value=$port
+fi
+
+# Language if not present
+if ! [[ "$language" ]]; then
+  language="en"
+  ynh_app_setting_set --app=$app --key=language --value=$language
 fi
 
 #=================================================
@@ -111,13 +117,6 @@ ynh_script_progression --message="Upgrading NGINX web server configuration..." -
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
-#=================================================
-# INSTALL DEPENDENCIES
-#=================================================
-#ynh_script_progression --message="Installing dependencies..." --weight=10
-
-#ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
-
 #=================================================
 # SETUP SYSTEMD
 #=================================================