diff --git a/scripts/upgrade b/scripts/upgrade
index 4547608..eeb9ba5 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -26,7 +26,8 @@ sudo cp -a ../sources/. $src_path
 
 # Set permissions to app files
 # you may need to make some file and/or directory writeable by www-data (nginx user)
-sudo chown -R root: $src_path
+sudo chown -R www-data:www-data $src_path
+sudo chmod -R 755 $src_path 
 
 # Modify Nginx configuration file and copy it to Nginx conf directory
 nginx_conf=../conf/nginx.conf
@@ -36,6 +37,7 @@ sed -i "s@YNH_WWW_ALIAS@$src_path/@g" $nginx_conf
 #
 sed -i "s@YNH_WWW_APP@$app@g" $nginx_conf
 sudo cp $nginx_conf /etc/nginx/conf.d/$domain.d/$app.conf
+sudo chmod 644 /etc/nginx/conf.d/$domain.d/$app.conf
 
 ### PHP ###
 # If a dedicated php-fpm process is used: