Topic on Extension talk:Elastica

The page says PHP 5.3+ works, yet when I run composer I get:

Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.
 Problem 1
   - Installation request for satooshi/php-coveralls dev-master -> satisfiable by satooshi/php-coveralls[dev-master].
   - satooshi/php-coveralls dev-master requires php ^5.5 || ^7.0 -> your PHP version (5.4.16) does not satisfy that requirement.

... so "5.3+" is not accurate?

Which version of MediaWiki are you running? And more important, which version (REL1_2X) of the extension do you use, newer releases require newer versions of PHP.