rack-dev-mark.gemspec in rack-dev-mark-0.7.8 vs rack-dev-mark.gemspec in rack-dev-mark-0.7.9

@@ -16,10 +16,10 @@
   gem.executables = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   gem.require_paths = ['lib']
 
   gem.required_ruby_version = ['>= 2.3']
 
-  gem.add_dependency "rack", ['>= 1.1', '< 2.1']
+  gem.add_dependency "rack", ['>= 1.1', '< 2.3']
 
   gem.add_development_dependency "rake"
   gem.add_development_dependency "rspec", ">= 3.0"
   gem.add_development_dependency "coveralls"
 end