Text box for "Logout destination" isn't big enough

Hello,

I am trying to use the Logout destination option in the CAS module configuration options (under "Redirection Settings") but the "maxlength" for the input text box is set to "55" and the CAS logout URL for the University I work for is over 70 with the option to add variables containing a display message.

Would it be possible to increase this text box maxlength to something like 128? (or why not even 256)

Thanks,
J