php - unable to run "composer update" -


when try run "composer update" following error:

fatal error: call undefined method reflectionparameter::gettype() in phar://c:/programdata/composersetup/bin/composer .phar/src/composer/repository/repositorymanager.php on line 110

php -v tells me i'm running 5.5.15 , composer --version tells me following:

composer version 1.0-dev (974fb4ac66c427b87f3cfa29e1320cd97f182b9d) 2016-01-16 17:45:40

the php version should acceptable since composer says minimally requires version 5.3.3 per https://getcomposer.org/doc/00-intro.md#system-requirements

aany ideas?


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