diff --git a/unify/utils/helpers.py b/unify/utils/helpers.py
index e95baaa..4f966bd 100644
--- a/unify/utils/helpers.py
+++ b/unify/utils/helpers.py
@@ -66,7 +66,10 @@ def keep(v):
         if v is None:
             return False
         else:
-            return bool(_prune_dict(v))
+            ret = _prune_dict(v)
+            if isinstance(ret, dict) or isinstance(ret, list) or isinstance(ret, tuple):
+                return bool(ret)
+            return True
 
     if (
         not isinstance(val, dict)