Travis fails with rmagick gem v3.0

Hi everyone,
we updated our rmagick gem to v3.0.0 but travis build if failing now.
rmagick drops support for ImageMagick <6.8 while travis console shows, that it has ImageMagick version of 6.7.
Should we update ImageMagick ourselves in before_install script or wait for travis team to update ImageMagick in the environment?