Fix requirements again.
Fix requirements again.

RCOSDP/waterbutler,rdhyee/waterbutler,rafaeldelucena/waterbutler,Ghalko/waterbutler,chrisseto/waterbutler,icereval/waterbutler,Johnetordoff/waterbutler,kwierman/waterbutler,felliott/waterbutler,cosenal/waterbutler,hmoco/waterbutler,CenterForOpenScience/waterbutler,TomBaxter/waterbutler