Gemfile in hamlit-2.7.5 vs Gemfile in hamlit-2.8.0

@@ -1,14 +1,17 @@
 source 'https://rubygems.org'
 
 # Specify your gem's dependencies in hamlit.gemspec
 gemspec
 
+if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.2.2')
+  gem 'rack', '< 2'
+end
+
 gem 'benchmark-ips', '2.3.0'
 gem 'minitest-line'
 gem 'pry-byebug'
 
 if RUBY_PLATFORM !~ /mswin|mingw|bccwin|wince/
   gem 'faml'
-  gem 'lineprof'
   gem 'stackprof'
 end