## Development and Contributing
All of the code for Notmuch is available as [free
-software](http://www.fsf.org/licensing/essays/free-sw.html) released
+software](https://www.fsf.org/licensing/essays/free-sw.html) released
under the GNU [GPL version
-3](http://www.fsf.org/licensing/licenses/gpl.html). The latest
+3](https://www.fsf.org/licensing/licenses/gpl.html). The latest
versions can be checked out via git with this command:
git clone git://notmuchmail.org/git/notmuch