README.md in frikandel-2.2.1 vs README.md in frikandel-2.2.2

@@ -104,9 +104,10 @@
     $ export BUNDLE_GEMFILE=Gemfile.rails-4.0.x && bundle update && bundle exec rake spec
     $ export BUNDLE_GEMFILE=Gemfile.rails-4.1.x && bundle update && bundle exec rake spec
     $ export BUNDLE_GEMFILE=Gemfile.rails-4.2.x && bundle update && bundle exec rake spec
     $ export BUNDLE_GEMFILE=Gemfile.rails-5.0.x && bundle update && bundle exec rake spec
     $ export BUNDLE_GEMFILE=Gemfile.rails-5.1.x && bundle update && bundle exec rake spec
+    $ export BUNDLE_GEMFILE=Gemfile.rails-5.2.x && bundle update && bundle exec rake spec
 
 ## Contributing
 1. Fork it
 2. Create your feature branch (git checkout -b my-new-feature)
 3. Commit your changes (git commit -am 'Add some feature')