diff --git a/db/migrate/20190508192738_create_android_device_registration_tokens.rb b/db/migrate/20190508192738_create_android_device_registration_tokens.rb
index 75ee080..95d55c5 100644
--- a/db/migrate/20190508192738_create_android_device_registration_tokens.rb
+++ b/db/migrate/20190508192738_create_android_device_registration_tokens.rb
@@ -2,7 +2,7 @@ class CreateAndroidDeviceRegistrationTokens < ActiveRecord::Migration[5.2]
   def change
     create_table :android_device_registration_tokens do |t|
       t.string :token
-      t.belongs_to :user, foreign_key: true
+      t.belongs_to :user, foreign_key: true, type: :integer
 
       t.timestamps
     end