"Usage: when-changed [-vr1s] FILE COMMAND" -- COMMAND passed to /bin/bash?

It seems that COMMAND by default is passed to /bin/sh -- if correct, is it possible to pass COMMAND to a different shell, say /bin/bash?  On Debian 11, /bin/sh is a symlink to /bin/dash -- relinking it to /bin/bash works, but hopefully there's a more gentle way than this.  Thanks.  