diff --git a/src/cloudforet/cost_analysis/manager/cost_manager.py b/src/cloudforet/cost_analysis/manager/cost_manager.py
index a658745..c42154e 100644
--- a/src/cloudforet/cost_analysis/manager/cost_manager.py
+++ b/src/cloudforet/cost_analysis/manager/cost_manager.py
@@ -51,8 +51,6 @@ def _make_cost_data(self, results):
 
             self._check_required_fields(result)
 
-            result['additional_info']['Account'] = result.get('account')
-
             try:
                 data = {
                     'cost': result['cost'],
diff --git a/src/cloudforet/cost_analysis/model/job_model.py b/src/cloudforet/cost_analysis/model/job_model.py
index fb81dd7..59cdc59 100644
--- a/src/cloudforet/cost_analysis/model/job_model.py
+++ b/src/cloudforet/cost_analysis/model/job_model.py
@@ -1,5 +1,5 @@
 from schematics.models import Model
-from schematics.types import ListType, DateTimeType, StringType
+from schematics.types import ListType, StringType
 from schematics.types.compound import ModelType
 
 __all__ = ['Tasks']
@@ -14,8 +14,8 @@ class Task(Model):
 
 
 class Changed(Model):
-    start = StringType(required=True, max_length=7)
-    end = StringType(default=None, max_length=7)
+    start = StringType(required=True)
+    end = StringType(default=None)
 
 
 class Tasks(Model):