php - Heroku - Push rejected on Laravel 4.2 project Mcrypt error -

i 'm trying upload project laravel 4.2, using buildpack https://github.com/heroku/heroku-buildpack-php , following output.

counting objects: 88, done. delta compression using 4 threads. compressing objects: 100% (74/74), done. writing objects: 100% (88/88), 1010.88 kib | 0 bytes/s, done. total 88 (delta 8), reused 0 (delta 0) remote: compressing source files... done. remote: building source: remote:  remote: -----> using set buildpack heroku/php remote: -----> php app detected remote:  remote:  !     warning: 'composer.lock' not date latest remote:        changes in 'composer.json'. ensure not getting stale remote:        dependencies, run 'composer update' on machine , commit remote:        changes git before pushing again. remote:  remote: -----> bootstrapping... remote: -----> installing system packages... remote:        notice: no runtime required in composer.json; requirements remote:        dependencies in composer.lock used selection remote:        - php (7.0.2) remote:        - apache (2.4.16) remote:        - nginx (1.8.0) remote: -----> enabling php extensions... remote:        - ext-pcntl (composer.lock) remote:        - ext-zend-opcache (automatic) remote: -----> installing dependencies... remote:        composer version 1.0.0-alpha11 2015-11-14 16:21:07 remote:        loading composer repositories package information remote:        installing dependencies lock file remote:        warning: lock file not date latest changes in composer.json. may getting outdated dependencies. run update update them. remote:          - installing symfony/translation (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/security-core (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/routing (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/process (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/http-foundation (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/event-dispatcher (v2.8.2) remote:            downloading: 100% remote:         remote:          - installing symfony/debug (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing psr/log (1.0.0) remote:            downloading: 100% remote:         remote:          - installing symfony/http-kernel (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/finder (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/dom-crawler (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/css-selector (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/console (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing symfony/browser-kit (v2.5.12) remote:            downloading: 100% remote:         remote:          - installing swiftmailer/swiftmailer (v5.4.1) remote:            downloading: 100% remote:         remote:          - installing stack/builder (v1.0.3) remote:            downloading: 100% remote:         remote:          - installing predis/predis (v0.8.7) remote:            downloading: 100% remote:         remote:          - installing phpseclib/phpseclib (0.3.10) remote:            downloading: 100% remote:         remote:          - installing patchwork/utf8 (v1.3.0) remote:            downloading: 100% remote:         remote:          - installing nesbot/carbon (1.17.0) remote:            downloading: 100% remote:         remote:          - installing monolog/monolog (1.17.2) remote:            downloading: 100% remote:         remote:          - installing nikic/php-parser (v0.9.5) remote:            downloading: 100% remote:         remote:          - installing jeremeamia/superclosure (1.0.2) remote:            downloading: 100% remote:         remote:          - installing ircmaxell/password-compat (v1.0.4) remote:            downloading: 100% remote:         remote:          - installing filp/whoops (1.1.10) remote:            downloading: 100% remote:         remote:          - installing d11wtq/boris (v1.0.10) remote:            downloading: 100% remote:         remote:          - installing symfony/filesystem (v2.8.2) remote:            downloading: 100% remote:         remote:          - installing classpreloader/classpreloader (1.0.2) remote:            downloading: 100% remote:         remote:          - installing laravel/framework (v4.2.18) remote:            downloading: 100% remote:         remote:        generating optimized autoload files remote:        > php artisan clear-compiled remote:        mcrypt php extension required. remote:        script php artisan clear-compiled handling post-install-cmd event returned error remote:         remote:         remote:                               remote:          [runtimeexception]   remote:          error output:        remote:                               remote:         remote:         remote:        install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-plugins] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--ignore-platform-reqs] [--] [<packages>]... remote:         remote:         remote:  remote:  !     push rejected, failed compile php app remote:  remote: verifying deploy.... remote:  remote: !   push rejected fzamudio. remote:  https://git.heroku.com/fzamudio.git  ! [remote rejected] master -> master (pre-receive hook declined) error: failed push refs 'https://git.heroku.com/fzamudio.git' 

it project default

composer create-project laravel/laravel fzamudio 4.2 --prefer-dist 

i not change anything, remove composer.lock .gitignore, add procfile with

web : vendor / bin / php- apache2 - heroku public 

and init git.

i did composer update , did not work.

from thank much.