bundle update hangs.

While bundle install works with no problems, when I run bundle update
it hangs indefinitely.
You find so?

Seems on `bundle update` bundler trying to update all dependencies for
all listed gems in Gemfile.
So maybe it's hangs up on some specific gem. Try to update only gems
that you need(e.g. `bundle update rails`).

You are right.
The problematic gem was meta_search.