diff --git a/cfg_checker/common/__init__.py b/cfg_checker/common/__init__.py
index 427bc76..8316e39 100644
--- a/cfg_checker/common/__init__.py
+++ b/cfg_checker/common/__init__.py
@@ -7,6 +7,16 @@
 from settings import config
 
 
+def nested_set(_d, _keys, _value):
+    # # import and deepcopy for safety
+    # from copy import deepcopy
+    # _d = deepcopy(_dict)
+    # process
+    for k in _keys[:-1]:
+        _d = _d.setdefault(k, {})
+    _d[_keys[-1]] = _value
+
+
 utils = Utils()
 const = const
 logger = logger