diff --git a/app/models/repository.rb b/app/models/repository.rb
index 4d81c47..f1ff1a6 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -283,8 +283,7 @@ class Repository < ActiveRecord::Base
 
   # Returns an array of committers usernames and associated user_id
   def committers
-    @committers ||= Changeset.connection.select_rows(
-         "SELECT DISTINCT committer, user_id FROM #{Changeset.table_name} WHERE repository_id = #{id}")
+    @committers ||= Changeset.where(:repository_id => id).uniq.pluck(:committer, :user_id)
   end
 
   # Maps committers username to a user ids