How do I install http_request2 package via composer?

I saw that http_request2 is on github and it has a composer.json file. But there is no description on how to add http_request2 to my project via composer. So I added these sections to my composer.json: "repositories": [ { "type": "pear", "url": "pear.php.net" } ], "require": { "pear/http_request2": "*" }, But composer tells me: $ sudo composer update Loading composer repositories with package information Initializing PEAR repository http://pear.php.net Updating dependencies (including require-dev) Your requirements could not be resolved to an installable set of packages. Problem 1 - Installation request for pear/http_request2 * -> satisfiable by fpoirotte/http_request2[2.1.1-patch1]. - fpoirotte/http_request2 2.1.1-patch1 requires pear/pear_exception dev-master -> no matching package found. Why is pear_exception not found? Can someone add composer instructions to the github page? https://github.com/pear/HTTP_Request2 Thanks, Ty