diff --git a/src/tools/common/data_objects.py b/src/tools/common/data_objects.py
index ed2ef4dc..5d2f3164 100644
--- a/src/tools/common/data_objects.py
+++ b/src/tools/common/data_objects.py
@@ -87,13 +87,13 @@ class BlogItem(object):
     @property
     def tags(self):
         if self._tags is None:
-            self._tags = data_format.dict2iter('tag', self.mb_data)
+            self._tags = list(data_format.dict2iter('tag', self.mb_data))
         return self._tags
 
     @property
     def groups(self):
         if self._groups is None:
-            self._groups = data_format.dict2iter('group', self.mb_data)
+            self._groups = list(data_format.dict2iter('group', self.mb_data))
         return self._groups
 
     @property