diff --git a/emmet-core/emmet/core/utils.py b/emmet-core/emmet/core/utils.py
index 0baec7e683..046e79946f 100644
--- a/emmet-core/emmet/core/utils.py
+++ b/emmet-core/emmet/core/utils.py
@@ -62,7 +62,7 @@ def _get_sg(struc):
             yield group
 
 
-def jsanitize(obj, strict=False, allow_bson=True):
+def jsanitize(obj, strict=False, allow_bson=False):
     """
     This method cleans an input json-like object, either a list or a dict or
     some sequence, nested or otherwise, by converting all non-string