apache2 apache2-dev build-essential git-core \
postgresql postgresql-contrib libpq-dev postgresql-server-dev-all \
libsasl2-dev imagemagick phantomjs
-gem2.5 install rake bundler
+gem2.5 install rake
+gem2.5 install --version "~> 1.16.2" bundler
## install the bundle necessary for openstreetmap-website
pushd /srv/openstreetmap-website