I'm using KnpSnappyBundle for my Symfony project and I'm trying to define some options in my config file. However if I set, for example:

knp_snappy:
    pdf:
        enabled:    true
        binary:     /usr/local/bin/wkhtmltopdf
        options:    [ 'no-outline' ]

I get an error: The option '0' does not exist.

How do I define options for the bundle?

symfony wkhtmltopdf
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