diff --git a/check_process b/check_process
index 759a0c8..3e6fc80 100644
--- a/check_process
+++ b/check_process
@@ -1,12 +1,12 @@
 ;; Test complet
 	; Manifest
-		domain="domain.tld"	(DOMAIN)
-		path="/path"	(PATH)
-		admin="john"	(USER)
+		domain="domain.tld"
+		path="/path"
+		admin="john"
 		language="fr"
-		is_public=1	(PUBLIC|public=1|private=0)
+		is_public=1
 		password="pass"
-		port="666"	(PORT)
+		port="666"
 	; Checks
 		pkg_linter=1
 		setup_sub_dir=1
diff --git a/manifest.json b/manifest.json
index aed4366..eafe5a8 100644
--- a/manifest.json
+++ b/manifest.json
@@ -15,7 +15,7 @@
         "url": "https://github.com/Yunohost-Apps/nodebb_ynh"
     },
     "requirements": {
-        "yunohost": ">> 4.1.7"
+        "yunohost": ">> 4.2.4"
     },
     "multi_instance": false,
     "services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 1382e95..c11637d 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -21,20 +21,6 @@ nodejs_version=14
 # FUTURE OFFICIAL HELPERS
 #=================================================
 
-# Execute a command as another user
-# usage: ynh_exec_as USER COMMAND [ARG ...]
-ynh_exec_as() {
-  local USER=$1
-  shift 1
-
-  if [[ $USER = $(whoami) ]]; then
-    eval "$@"
-  else
-    sudo -u "$USER" "$@"
-  fi
-}
-
-
 # Send an email to inform the administrator
 #
 # usage: ynh_send_readme_to_admin app_message [recipients]
diff --git a/scripts/install b/scripts/install
index 39cf80a..bf7ef7c 100644
--- a/scripts/install
+++ b/scripts/install
@@ -111,6 +111,10 @@ ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$final_path"
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:www-data "$final_path"
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
@@ -148,9 +152,9 @@ pushd $final_path
 	#npm install nodebb-plugin-dbsearch --save-prod
 	#ynh_exec_as $app env $ynh_node_load_PATH 
 	#./nodebb build -l
-	#exec_as $app ./nodebb setup -l > $install_log
-	#exec_as $app npm install nodebb-plugin-dbsearch --save-prod
-	#exec_as $app ./nodebb build -l
+	#ynh_exec_as $app ./nodebb setup -l > $install_log
+	#ynh_exec_as $app npm install nodebb-plugin-dbsearch --save-prod
+	#ynh_exec_as $app ./nodebb build -l
 popd
 
 #=================================================
@@ -207,10 +211,10 @@ $mail_content
 
 If you are facing any problem or want to improve this app, please open a new issue here: https://github.com/YunoHost-Apps/nodebb_ynh"
 
+ynh_send_readme_to_admin "$message"
+
 #=================================================
 # END OF SCRIPT
 #=================================================
 
 ynh_script_progression --message="Installation of $app completed" --last
-
-ynh_send_readme_to_admin "$message"