diff --git a/lib/tasks/batch_add_contributors.rake b/lib/tasks/batch_add_contributors.rake
index de42e1be..1e9e5c57 100644
--- a/lib/tasks/batch_add_contributors.rake
+++ b/lib/tasks/batch_add_contributors.rake
@@ -95,7 +95,7 @@ namespace :batch_add_contributors do
       sql_connection.begin_db_transaction
       site = Site.find_by_sql("select id, created_at from commit_contributors where name='#{commiter['email']}'")
       if site.present?
-        puts "commit_date====#{commit_date},created_at======#{site.created_at}"
+        puts "commit_date====#{commit_date},created_at======#{site.first&.created_at}"
         if commit_date.to_i < site.created_at.to_i
           sql = "update commit_contributors set created_at ='#{commit_date_str}' where name='#{commiter['email']}'"
         end