HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set

Minha JPAConfiguration:

public class JPAConfiguration {

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean(); 
        JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();        
        factoryBean.setJpaVendorAdapter(vendorAdapter);        

        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setUsername("root");
        dataSource.setPassword("");
        dataSource.setUrl("jdbc:mysql://localhost:3306/casadocodigo");
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");

        factoryBean.setDataSource(dataSource);

        Properties properties = new Properties();
        properties.setProperty("hybernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
        properties.setProperty("hybernate.show_sql", "true");
        properties.setProperty("hibernate.hbm2ddl.auto", "update");
        factoryBean.setJpaProperties(properties);

        factoryBean.setPackagesToScan("org.curso.loja.models");

        return factoryBean;
    }

}

Alguém me dá uma luz?