Clojure applications now use Leiningen 2.9.1
Change effective on 12 August 2019
Heroku’s support for Clojure applications now uses Leiningen 2.9.1. You can customize the version of Leiningen by adding a lein
script to the bin/
directory in your app’s repo. For more information, see the Heroku Dev Center documentation for Clojure.