Quantcast Choice regularly receives updates for improvements and bug-fixes. Users who wish to robustly test changes to Quantcast Choice on a staging or test environment before moving to production can pin to a specific version of Quantcast Choice. Versions will be deprecated 30 days following the release of a new version. Quantcast Choice users will be notified via email when a new version is released, so that they have time to test and migrate to the latest version.
The file source generated by the Quantcast Choice Self Serve tool will always use the most recent version of Quantcast Choice, with the url:
elem.src = 'https://quantcast.mgr.consensu.org/cmp.js';
elem.src = 'https://quantcast.mgr.consensu.org/v2/cmp.js';
Note that the version (v2, in the example above) needs to be replaced with the desired version number. Version numbers are published in the Quantcast Choice release notes.