ENV GEM_PATH /usr/local/rvm/gems/ruby-2.0.0-p247:/usr/local/rvm/gems/ruby-2.0.0-p247@global
ENV PATH /usr/local/rvm/gems/ruby-2.0.0-p247/bin:/usr/local/rvm/gems/ruby-2.0.0-p247@global/bin:/usr/local/rvm/rubies/ruby-2.0.0-p247/bin:/usr/local/rvm/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+# Update gem. This (hopefully) fixes
+# https://github.com/rubygems/rubygems.org/issues/613.
+RUN gem update --system
+
ENV DEBIAN_FRONTEND noninteractive
+