diff --git a/django_project/fixtures/initial_data.json b/django_project/fixtures/initial_data.json
index 7b3bd9d..f5c7d0d 100644
--- a/django_project/fixtures/initial_data.json
+++ b/django_project/fixtures/initial_data.json
@@ -37,6 +37,7 @@
         "description": "Milestone 1 is the initial milestone.", 
         "author": 1, 
         "created_at": "2014-01-17T09:46:18.825Z", 
+        "modified_at": "2014-01-17T09:46:18.825Z", 
         "project": 1, 
         "deadline": "2014-01-27", 
         "slug": "milestone-1", 
@@ -51,6 +52,7 @@
         "description": "Milestone 2 is the next milestone.", 
         "author": 1, 
         "created_at": "2014-01-17T09:46:52.833Z", 
+        "modified_at": "2014-01-17T09:46:52.833Z", 
         "project": 1, 
         "deadline": "2014-01-31", 
         "slug": "milestone-2",