circuitbox.gemspec in circuitbox-1.0.3 vs circuitbox.gemspec in circuitbox-1.1.0

@@ -1,10 +1,12 @@
 # coding: utf-8
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'circuitbox/version'
 
+ruby_2_2_2_plus = Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("2.2.2")
+
 Gem::Specification.new do |spec|
   spec.name          = "circuitbox"
   spec.version       = Circuitbox::VERSION
   spec.authors       = ["Fahim Ferdous"]
   spec.email         = ["[e-mail]"]
@@ -18,11 +20,15 @@
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake"
-  spec.add_development_dependency "rack"
+  if ruby_2_2_2_plus
+    spec.add_development_dependency "rack"
+  else
+    spec.add_development_dependency "rack", '< 2'
+  end
   spec.add_development_dependency "gimme"
   spec.add_development_dependency "minitest"
   spec.add_development_dependency "mocha"
   spec.add_development_dependency "typhoeus"
   spec.add_development_dependency "timecop"
@@ -31,8 +37,12 @@
   spec.add_development_dependency "logger"
   spec.add_development_dependency "bundler-gem_version_tasks"
   spec.add_development_dependency "lmdb"
   spec.add_development_dependency "daybreak"
 
-  spec.add_dependency "activesupport"
+  if ruby_2_2_2_plus
+    spec.add_dependency "activesupport"
+  else
+    spec.add_dependency "activesupport", '< 5'
+  end
   spec.add_dependency "moneta"
 end