diff --git a/usr/lib/python3.8/spoc/app.py b/usr/lib/python3.8/spoc/app.py
index b67c402..d149ec5 100644
--- a/usr/lib/python3.8/spoc/app.py
+++ b/usr/lib/python3.8/spoc/app.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+import copy
 import json
 import os
 import shutil