diff --git a/db/migrate/032_create_messages.rb b/db/migrate/032_create_messages.rb
--- a/db/migrate/032_create_messages.rb
+++ b/db/migrate/032_create_messages.rb
@@ -1,6 +1,6 @@
-class CreateMessages < ActiveRecord::Migration
+class CreateMessages < ActiveRecord::Migration[4.2]
   def self.up
-    create_table :messages do |t|
+    create_table :messages, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci" do |t|
       t.column "sender_id", :integer
       t.column "receiver_id", :integer
       t.column "replying_message_id", :integer