diff --git a/config/main.py b/config/main.py
index f838fed653..aad6b3227a 100755
--- a/config/main.py
+++ b/config/main.py
@@ -10,6 +10,7 @@
 import time
 import netifaces
 import threading
+import json
 
 import sonic_device_util
 import ipaddress