How to specify Javadoc HTML version with Maven?

I did this by adding additionalOptions to the configuration section of the Javadoc plugin:

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-javadoc-plugin</artifactId>
            <version>3.0.1</version>
            <configuration>
                <additionalOptions>-html5</additionalOptions>
            </configuration>
        </plugin>
    </plugins>
</build>