diff --git a/scripts/upgrade b/scripts/upgrade
index 011797f..ebc43c0 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -87,6 +87,10 @@ then
 	ynh_setup_source --dest_dir="$final_path/build"
 fi
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:www-data "$final_path"
+
 #=================================================
 # UPGRADE DEPENDENCIES
 #=================================================