diff --git a/db/migrate/20100216105730_create_contests.rb b/db/migrate/20100216105730_create_contests.rb
--- a/db/migrate/20100216105730_create_contests.rb
+++ b/db/migrate/20100216105730_create_contests.rb
@@ -1,6 +1,6 @@
-class CreateContests < ActiveRecord::Migration
+class CreateContests < ActiveRecord::Migration[4.2]
   def self.up
-    create_table :contests do |t|
+    create_table :contests, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci" do |t|
       t.string :title
       t.boolean :enabled