 <p>I suppose you have in Gemfile</p> <pre><code>gem 'sprockets', '&gt;= 2.2.1' gem 'tilt', '2.0.0' </code></pre> <p>is <code>tilt</code> version 2.0.0 critical important? If it possible to downgrade it you can do following.</p> <p>change in Gemfile</p> <pre><code>gem 'tilt', '1.4.1' # the previous version http://rubygems.org/gems/tilt </code></pre> <p>run</p> <pre><code>bundle update tilt </code></pre> <p>After this you can remove tilt version from Gemfile</p>