rack-dev-mark.gemspec in rack-dev-mark-0.7.5 vs rack-dev-mark.gemspec in rack-dev-mark-0.7.6

@@ -14,12 +14,12 @@
   gem.files       = `git ls-files`.split("\n")
   gem.test_files  = `git ls-files -- {test,spec,features}/*`.split("\n")
   gem.executables = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   gem.require_paths = ['lib']
 
-  gem.required_ruby_version = '>= 2.0.0'
+  gem.required_ruby_version = ['>= 2.2', '< 2.5']
 
-  gem.add_dependency "rack", ">= 1.1"
+  gem.add_dependency "rack", ['>= 1.1', '< 2.1']
 
   gem.add_development_dependency "rake"
   gem.add_development_dependency "rspec", ">= 3.0"
   gem.add_development_dependency "coveralls"
 end