Gemfile.ci in pageflow-external-links-2.2.0 vs Gemfile.ci in pageflow-external-links-2.2.1

@@ -1,5 +1,8 @@
 source 'https://rubygems.org'
 
 gemspec
 
 gem 'pageflow-theme-doc-publisher', git: 'https://github.com/tf/pageflow-theme-doc-publisher'
+
+# Give a hint to Bundler to prevent endless loop
+gem 'rails', '~> 5.2.0'