diff --git a/healthcareio/x12/parser.py b/healthcareio/x12/parser.py
index 71fd49d..536efe9 100644
--- a/healthcareio/x12/parser.py
+++ b/healthcareio/x12/parser.py
@@ -158,7 +158,11 @@ class X12Parser(BasicParser):
             _store['cotnext'] = 'write'
             _writer = transport.factory.instance(**_store)                    
             # if _store['provider'] not in [providers.MONGODB, providers.COUCHDB] :
-               
+
+            for _document in _documents :
+                for field in _document :
+                    if type(_document[field]) in [dict,list] :
+                        _document[field] = json.dumps(_document[field],default=str)
                 
             _writer.write(_documents,table=TABLE)
             if getattr(_writer,'close') :