A while ago a reddit post showed up, where someone installed version 9.99.99 of paragonie/random_compat. Seeing a package update from 2.* to 9.99.99 may be a bit confusing, but given how autolaoding, polyfills and composer work in php, this is actually quite a clever way of dealing with things. Lets take a look at version constraints, autoloading and composer to see why.