diff --git a/db/migrate/20170524182846_add_unread_tracking_columns.rb b/db/migrate/20170524182846_add_unread_tracking_columns.rb
index 28cb3d7d251..a3f685f88a0 100644
--- a/db/migrate/20170524182846_add_unread_tracking_columns.rb
+++ b/db/migrate/20170524182846_add_unread_tracking_columns.rb
@@ -4,6 +4,6 @@ class AddUnreadTrackingColumns < ActiveRecord::Migration
   end
 
   def down
-    raise "Can not be reverted"
+    raise ActiveRecord::IrreversibleMigration
   end
 end
diff --git a/db/migrate/20170526125321_drop_unread_tracking_columns.rb b/db/migrate/20170526125321_drop_unread_tracking_columns.rb
index 3d118702189..71b04ddedc1 100644
--- a/db/migrate/20170526125321_drop_unread_tracking_columns.rb
+++ b/db/migrate/20170526125321_drop_unread_tracking_columns.rb
@@ -3,6 +3,6 @@ class DropUnreadTrackingColumns < ActiveRecord::Migration
   end
 
   def down
-    raise "Can not be reverted"
+    raise ActiveRecord::IrreversibleMigration
   end
 end