diff --git a/lib/chewy/journal.rb b/lib/chewy/journal.rb
index 68970e732..403ede0c1 100644
--- a/lib/chewy/journal.rb
+++ b/lib/chewy/journal.rb
@@ -7,7 +7,7 @@ class Journal
           type_name: { type: 'string', index: 'not_analyzed' },
           action: { type: 'string', index: 'not_analyzed' },
           object_ids: { type: 'string', index: 'not_analyzed' },
-          created_at: { type: 'date', format: 'basic_date_time' }
+          created_at: { type: 'date' }
         }
       }
     }.freeze