diff --git a/scripts/_common.sh b/scripts/_common.sh
index 67e4fc3..d1b8f81 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -256,35 +256,3 @@ $(yunohost tools diagnosis | grep -B 100 "services:" | sed '/services:/d')"
 	# Send the email to the recipients
 	echo "$mail_message" | $mail_bin -a "Content-Type: text/plain; charset=UTF-8" -s "$mail_subject" "$recipients"
 }
-
-# Exit without error if the package is up to date
-#
-# This helper should be used to avoid an upgrade of a package
-# when it's not needed.
-#
-# To force an upgrade, even if the package is up to date,
-# you have to set the variable YNH_FORCE_UPGRADE before.
-# example: sudo YNH_FORCE_UPGRADE=1 yunohost app upgrade MyApp
-#
-# usage: ynh_abort_if_up_to_date
-ynh_abort_if_up_to_date () {
-	local force_upgrade=${YNH_FORCE_UPGRADE:-0}
-	local package_check=${PACKAGE_CHECK_EXEC:-0}
-
-	local version=$(ynh_read_json "/etc/yunohost/apps/$YNH_APP_INSTANCE_NAME/manifest.json" "version" || echo 1.0)
-	local last_version=$(ynh_read_manifest "version" || echo 1.0)
-	if [ "$version" = "$last_version" ]
-	then
-		if [ "$force_upgrade" != "0" ]
-		then
-			echo "Upgrade forced by YNH_FORCE_UPGRADE." >&2
-			unset YNH_FORCE_UPGRADE
-		elif [ "$package_check" != "0" ]
-		then
-			echo "Upgrade forced for package check." >&2
-		else
-			ynh_die "Up-to-date, nothing to do" 0
-		fi
-	fi
-}
-
diff --git a/scripts/install b/scripts/install
index 9b6b61f..6687c23 100755
--- a/scripts/install
+++ b/scripts/install
@@ -88,9 +88,9 @@ 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"
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:www-data "$final_path"
 
 #=================================================
 # NGINX CONFIGURATION
diff --git a/scripts/restore b/scripts/restore
index adfb722..c3ee36d 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -69,6 +69,10 @@ ynh_script_progression --message="Restoring the app main directory..." --weight=
 
 ynh_restore_file --origin_path="$final_path"
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:www-data "$final_path"
+
 #=================================================
 # RESTORE THE PHP-FPM CONFIGURATION
 #=================================================
@@ -99,7 +103,7 @@ ynh_mysql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./
 # RESTORE USER RIGHTS
 #=================================================
 
-set_permissions
+#set_permissions
 
 #=================================================
 # SETUP SSOWAT
diff --git a/scripts/upgrade b/scripts/upgrade
index 5d360aa..90e2ad3 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -115,6 +115,10 @@ ynh_setup_source "$final_path"	# Télécharge la source, décompresse et copie d
 # Restore config, plugins and themes
 ynh_restore_persistent
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:www-data "$final_path"
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
@@ -142,7 +146,7 @@ ynh_add_fpm_config
 # SECURING FILES AND DIRECTORIES
 #=================================================
 
-set_permissions
+#set_permissions
 
 #=================================================
 # UPGRADE DB