Hi, 

I am trying to configure Plack::Middleware::Expires and Deflater to add an expires header and gzip with the following in my config.yml:

plack_middlewares:

  -

    - Expires

    - content-type

    -

      - image/gif

      - image/jpeg

    - expires

    - access plus 1 day

  -

    - Deflater

I find that while the Deflater middleware works correctly, the Expires does not. Is there an error in my YAML syntax? I tried to parse the YAML separately and I seem to get the correct options that Expires expects.

Would appreciate your help,

Thank you.