columnify.gemspec in columnify-0.1.0 vs columnify.gemspec in columnify-0.1.1

@@ -22,9 +22,10 @@
   spec.bindir = "exe"
   spec.executables = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
   spec.add_dependency "spreadsheet"
+  spec.add_dependency 'rails', '>= 5.0', '<= 6.0'
 
   spec.add_development_dependency "bundler", "~> 1.17"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end