diff --git a/www/html/_plugins/transport.py b/www/html/_plugins/transport.py
index d6c8f0d..785bdd2 100644
--- a/www/html/_plugins/transport.py
+++ b/www/html/_plugins/transport.py
@@ -53,7 +53,7 @@ def apply (**_args):
         else:
             _data = _qreader.read( **json.loads(_query))
         if _data.shape[0] :
-            _data = _data.astype(str).to_dict(orient='records') #',index=False)
+            _data = _data.fillna('').astype(str).to_dict(orient='records') #',index=False)
         else:
             _data = []
         _qreader.close()