Composer PHP-FPCalc No Version Set (Parsed as 1.0.0)

[ClintSulis]

Greetings! I'm unable to require php-fpcalc using composer. Full disclosure, I have a lot of PHP experience but this is the first time I'm trying to use composer. Please let me know what I'm doing wrong!

composer require mrfeathers/php-fpcalc

Using version dev-master for mrfeathers/php-fpcalc
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- The requested package mrfeathers/php-fpcalc No version set (parsed as 1.0.0) is satisfiable by mrfeathers/php-fpcalc[No version set (parsed as 1.0.0)] but these conflict with your requirements or minimum-stability.

Installation failed, reverting ./composer.json to its original content.

[mrfeathers]

Hi @ClintSulis could you show your composer.json file?