Migration doesn't update database

I have this simple code which when I run - it does not do anything at all. When I migrate, the migration runs - I have feedback from console: Migrated..... But the database stays the same. In migrations table I see my migration, also with a correct batch.

<?php

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class AddDateToProgram extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('schedules', function(Blueprint $table) {
            $table->string('day')->default('2018-05-24')->nullable();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('schedules', function(Blueprint $table) {
            $table->dropIfExists('day');
        });
    }
}

via Chebli Mohamed